A111Q3 Dfl^mE

^'^iimmmnlLV'^^'^'^'^^^ * TECH r.i.c.

A1 1103089142 CE & TECHNOLOGY;

MAY 1 6 1973

OATA AUTOMATiON DIVISION

2VCCESSING INDIVIDUAL

RECORDS FROM

personal data files

Using non-unique

identifiers

DO-2

NBS Special Publication 500-2

U.S. DEPARTMENT OF COMMERCE

National Bureau of Standards
NATIONAL BUREAU OF STANDARDS

The National Bureau of Standards^ was established by an act of Congress March 3, 1901. The Bureau's overall goal is to strengthen and advance the Nation's science and technology

and facilitate their effective application for public benefit. To this end, the Bureau conducts

research and provides: (1) a basis for the Nation's physical measurement system, (2) scientific and technological services for industry and government, (3) a technical basis for equity in trade, and (4) technical services to promote public safety. The Bureau consists of the Institute for Basic Standards, the Institute for Materials Research, the Institute for Applied Technology,

the Institute for Computer Sciences and Technology, and the Office for Information Programs.

THE INSTITUTE FOR BASIC STANDARDS provides the central basis within the United

States of a complete and consistent system of physical measurement; coordinates that system

with measurement si'stems of other nations; and furnishes essential services leading to accurate and uniform physical measurements throughout the Nation's scientific community, industry,

and commerce. The Institute consists of the Office of Measurement Services, the Office of Radiation Measurenitent and the following Center and divisions:

Applied Mathematics — Electricity — Mechanics — Heat — Optical Physics — Center

for Radiation Research: Nuclear Sciences; Applied Radiation — Laboratory Astrophysics

— Cryogenics " — Electromagnetics " — Time and Frequency

THE INSTITUTE FOR MATERIALS RESEARCH conducts materials research leading to improved methods of measurement, standards, and data on the properties of well-characterized materials needed by industry, commerce, educational institutions, and Government; provides

advisory and research services to other Government agencies; and develops, produces, and

distributes standard reference materials. The Institute consists of the Office of Standard

Reference Materials, the Office of Air and Water Measurement, and the following divisions:

Analytical Chemistry — Polymers — Metallurgy — Inorganic Materials — Reactor

Radiation — Physical Chemistry.

THE INSTITUTE FOR APPLIED TECHNOLOGY provides technical services to promote

the use of available technology and to facilitate technological innovation in industry and Government; cooperates with public and private organizations leading to the development of

technological standards (including mandatory safety standards), codes and methods of test; and provides technical advice and services to Government agencies upon request. The Insti- tute consists of the following divisions and Centers: Standards Application and Analysis — Electronic Technology — Center for Consumer

Product Technology: Product Systems Analysis; Product Engineering — Center for Building

Technology: Structures, Materials, and Life Safety; Building Environment; Technical Evaluation and Application — Center for Fire Research: Fire Science; Fire Safety Engineering.

THE INSTITUTE FOR COMPUTER SCIENCES AND TECHNOLOGY conducts research and provides technical services designed to aid Government agencies in improving cost effec- tiveness in the conduct of their programs through the selection, acquisition, and effective utilization of automatic data processing equipment; and serves as the principal focus within

the executive branch for the development of Federal standards for automatic data processing

equipment, techniques, and computer languages. The Institute consists of the following

divisions: Computer Services — Systems and Software — Computer Systems Engineering — Information Technology.

THE OFFICE FOR INFORMATION PROGRAMS promotes optimum dissemination and

accessibility of scientific information generated within NBS and other agencies of the Federal Government; promotes the development of the National Standard Reference Data System and

a system of information analysis centers dealing with the broader aspects of the National Measurement System; provides appropriate services to ensure that the NBS staff has optimum

accessibility to the scientific information of the world. The Office consists of the following

organizational units: Office of Standard Reference Data — Office of Information Activities — Oflfice of Technical

Publications — Library — Office of International Relations — OflSce of International Standards.

•1 Headquarters and Laboratories at Gaithersburg, Maryland, unless otherwise noted; mailing address Washington, D.C. 20234.

2 Located at Boulder, Colorado 80302.
mm

COMPUTER SCIENCE & TECHNOLOGY:

n

^ooi^ Accessing Individual Records

From Personal Data Files

Using Non-Unique Identifiers

Gwendolyn B. Moore

John L. Kuhns

Jeffrey L. Trefftzs

Christine A. Montgomery

Operating Systems, Inc. 21031 Ventura Boulevard

Woodland Hills, California 91364

Prepared for the

Institute for Computer Sciences and Technology

National Bureau of Standards Washington, D.C. 20234

U.S. DEPARTMENT OF COMMERCE

Dr. Betsy Ancker-Johnson, Assistant Secretary for Science and Technology

, NATIONAL BUREAU OF STANDARDS, Ernest Ambler, Acting Director

Issued February 1977
Reports on Computer Science and Technology

The National Bureau of Standards has a special responsibility within the Federal

Government for computer science and technology activities. The programs of the

NBS Institute for Computer Sciences and Technology are designed to provide ADP

standards, guidelines, and technical advisory services to improve the effectiveness of

computer utilization in the Federal sector, and to perform appropriate research and

development efforts as foundation for such activities and programs. This publication

series will report these NBS efforts to the Federal computer community as well as to interested specialists in the academic and private sectors. Those wishing to receive

notices of publications in this series should complete and return the form at the end

of this publication.

National Bureau of Standards Special Publication 500-2

Nat. Bur. Stand. (U.S.), Spec. Publ. 500-2,203 pages (Feb. 1977) CODEN: XNBSAV

Library of Congress Cataloging in Publication Data Main entry under title: Accessing individual records from personal data files using nonunique identifiers. (Computer science & technology) (NBS special publication ; 500-2) Supt.ofDocs.no.: C13. 10:500-2

I. Personnel records—Data processing. 2. Civil service—United

States—Personnel management. I. Moore, Gwendolyn B. H. Institute for Computer Sciences and Technology. III. Series. IV. Series: United

States. National Bureau of Standards. Special publication ; 500-2. QC100.U57 no. 500-2 [JK766.5] 602Ms [353.001] 76-57950

U.S. GOVERNMENT PRINTING OFFICE

WASHINGTON: 1977

For sale by the Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20402

(Order by SD Catalog No. C13:10:500-2). Stock No. 003-003-01726-4 Price $2.65

(Add 25 percent additional for other than U.S. mailing).
FOREWORD

How does a Federal agency locate a personal record in one of its

massive files with only a limited amount of information for guidance?

The Privacy Act of 1974 presented numerous agencies with just this

problem when it specified: "It shall be unlawful for any Federal,

state, or local government agency to deny to any individual any

right, benefit, or privilege provided by law because of such

individual's refusal to disclose his Social Security account number."

Those Federal agencies denied the use of Social Security numbers are not the only ones interested in the solution to this problem. For

instance, one might be required to locate individuals in a file

who have been inadvertently or illegally recorded under more than

one account number. Similarly, the results of a study of

methodologies for retrieving an individual's record without the

use of a universal identifier can be used to determine the threats

to an individual's privacy.

This report was written in response to this growing need for

retrieving information using non-unique identifiers. Presented are selected methodologies for assisting Federal agencies in selecting

retrieval algorithms and name lookup techniques; in analyzing their

data by the identification of weighting factors and statistical

sampling for determining error and omission rates; and lastly,

predicting the accuracy and efficiency of candidate retrieval keys.

Seymour Jeffery, Chief

Systems and Software Division

Institute for Computer Sciences

and Technology

National Bureau of Standards

iii
ACKNOWLEDGMENTS

The authors would like to express their appreciation to all those

who contributed to the preparation of this document through their

willingness to discuss their relevant experience and expertise.

Particular thanks are due two members of the NBS Institute for

Computer Sciences and Technology: Dr. Thomas C. Lowe, who coordinated this effort from its inception, gave incentive and direction

to the project while assisting in every way possible with preparation

of the final report; and John L. Berg, whose comments and suggestions

have been invaluable throughout the course of the project.

iv
TABLE OF CONTENTS

Page

1.0 Introduction 1 1.1 The Legislation 1 1.2 Retrieval of Individual Records 3

1.3 Statistical vs. Dossier Files 4

1.4 Privacy vs. Security 6

1.5 Summary 8

2.0 State-of-the-Art Retrieval Techniques 9

2.1 Introduction 9

2.2 Varying Selective Values of Non-Unique Identifiers ... 10

2.3 Importance of the Name Variable in Retrieval

Through Use of Non-Unique Identifiers 12

2.4 Selected State-of-the-Art for Name Lookup Techniques . . 12

2.5 Implementation of Name Lookup Techniques 26

2.6 Other Search Strategies 29

3.0 Identification of Weighting Factors 32

3.1 Accuracy Constraints Imposed by the Privacy Act 32

3.2 Determination of Weighting Factors for Existing Files. . 35

3.2.1 Data Base Definition and Forms Design ...... 36

3.2.2 Data Collection Techniques 37

3.2.3 Keying of Data and Input Controls 42

3.2.4 Computer Edit Routines 44

3.2.5 Kiariual Checks for Accuracy ^7

3.3 Summary of Weighting Factors 49

4.0 File Validation 52

4.1 Introduction 52

4.2 Validation Techniques 52

4.3 File Validation Example , 53

5.0 Computer Simulation of Data Base Retrieval . 59

5.1 Precision and Recall 59

5.2 Query Formulation for Best Results 61

5.3 Soft-Match Techniques 62

5.4 Example of Use of File Validation Summary Data 62

5.5 Precision and Probable Match 66

6.0 Conclusions and Recommendations 69

6.1 Conclusions 69

6.2 Recommendations 70

6.2.1 Evaluation of Current File Access Capability. . . 71 6.2.2 Evaluation of the Data Base 71

Appendix I - Precision Tables 73

i

V
TABLE OF ILLUSTRATIONS

Page

Table 2.4-1 IBM Alpha Inquiry System Personal

Name Encoding Algorithm 15

Table 2.4-2 Western Airlines Surname Match Rating Algorithm. ... 18

Table 2.4-3 Rules for Developing Phonetic Frequency Codes 19

Table 2.4-4 Letter Distributions for Phonetic Frequency

Code Name Lookup Technique 21

Table 2.4-5 Illustration of the Application of the NYSIIS

Coding Techniques 22

Table 2.4-6 NYSSIS Name Coding Rules 23

Form 3.1-1 Decay Factors of Standard Biographical

Data Elements 34

Form 3.2.1-1 Inherent Characteristics of Biographical

Data Elements 38

Form 3.2.1-2 Data Base Definition Weighting Factors for

Biographical Data Elements ..... 39

Form 3.2.2-1 Data Collection Procedure Weighting Factors for

Biographical Data Elements 43

Form 3.2.3-1 Keying and Input Control Weighting Factors

for Batch Input 45

Form 3,2.3-2 Keying and Input Control Weighting Factors

for Interactive Input 46

Form 3.2.4-1 Computer Editing Weighting Factors 48

Form 3.2.5-1 Weighting Factors for Manual Accuracy Checks 50

Form 3.3-1 Cumulative Weighting Factors for Standard

Biographical Data Elements 51

Table 4.2-1 Suggested Format for File Validation Record 54

Table 4.3-1 Source Documents for Ten Sample Records from

the Dummy Data Base. 55

Table 4.3-2 Computer Listings for Ten Sample Records from

the Dummy Data Base 56

Table 4.3-3 File Validation Record for a Sample Record

from the Dummy Data Base 57

Table 4.3-4 Summary of Errors and Omissions Detected in

Analysis of 10% of the File. ....... . 58

Table 5.3-1 Retrieval Ratios (Estimates of Proportion of File

Retrieved) 63

Table 5.3-2 Statistical Classification of Surname Records as Compiled from Social Security Administration Accounts. 64

vi
TABLE OF CONTENTS

(continued)

Page

Appendix II - A Probabilistic Formulation of the

Non-Unique Access Problem 174

Appendix III - Soft-Match Techniques 181

Appendix IV - FORTRAN Source Code for the Probability Mode. ... 186

vi i

ACCESSING INDIVIDUAL RECORDS FROM

PERSONAL DATA FILES USING NON-UNIQUE IDENTIFIERS

G. B. Moore, J. L. Kuhns, J. L. Trefftzs, C. A. Montgomery

Operating Systems, Inc.

ABSTRACT

j The Privacy Act of 1974 places restrictions on the Federal, state, and

' local agencies' use of the Social Security account number as an identifier. For some agencies, compliance will involve changes in implementation of retrieval algorithms. This report describes methodology applicable to these changes in the more general context of the problem of

retrieving individual records from files using non-unique identifiers.

State-of-the-art retrieval techniques are discussed, a method for assigning reliability weights to various personal data elements is presented,

file validation techniques for the error and omission rates of data items

are suggested, and a retrieval probability model -- designed to show

likelihood of retrieval of a subject's record given a variety of populations, combinations of identifiers, and error/omission rates -- is described. A methodology is developed for forming confidence factors from

the established error/omission rates for combinations of non-unique

identifiers that are candidates for use as retrieval keys. Use of these

confidence factors as indices into the precision tables produced by the

probability model is described.

Key Words: Data retrieval; file validation; name lookup; non-unique

identifiers; personal data files; Privacy Act, probability

model ; retri eval

1.0 INTRODUCTION

1.1 The Legislation

The Privacy Act of 1974 opens with the words:

"The Congress finds that-

(1) the privacy of an individual is directly affected by the

collection, maintenance, use, and dissemination of personal

information by Federal agencies;

(2) the increasing use of computers and sophisticated information technology, while essential to the efficient operations

of the Government, has greatly magnified the harm to individual privacy that can occur from any collection, maintenance, use, or dissemination of personal information;

(3) the opportunities for an individual to secure employment,

insurance, and credit, for his right to due process, and

other legal protections are endangered by the misuse of

certain information systems;

1
(4) the right to privacy is a personal and fundamental right

protected by the Constitution of the United States; and

(5) in order to protect the privacy of individuals identified

"in information systems maintained by Federal agencies, it

is necessary and proper for the Congress to regulate the

collection, maintenance, use, and dissemination of information by such agencies. "1

There has been increasing public concern over the trend toward integration and centralization of data banks containing personal information.

In the privacy legislation. Congress has explicitly defined the rights

of citizens whose records are maintained by Federal agencies as well as the responsibilities of the agencies handling the data. In addition,

the legislation also established the Privacy Protection Study Commission

which is specifically authorized to:

"...make a study of the data banks, automated data processing

programs, and information systems of governmental, regional,

and private organizations, in order to determine the standards

and procedures in force for the protection of personal information... In the course of conducting the study... the Commission may research, examine, and analyze. . .the use of social

security numbers, license plate numbers, universal identifiers,

and other symbols to identify individuals in data banks and to

gain access to, integrate, or centralize information systems

and files. "2

Specific prohibitions regarding use of universal identifiers will, for

the most part, await the results of the Privacy Protection Study

Commission study. The current emphasis is rather on restricting the

data maintained to that directly relevant to the agency. However,

since much of the concern over use of universal identifiers has been

generated by the use of the Social Security account numbers and their

potential for linking files, the Act has specifically provided against

its use as a required item of information unless a Federal statute

specifying such a disclosure is applicable.

"It shall be unlawful for any Federal, State or local government agency to deny to any individual any right, benefit, or privilege provided by law because of such individual's refusal to disclose his social security account number. "3

Privacy Act of 1974 , Public Law no. 93-579, Section 1.

Loc. cit.

Ibid. , Section 7.

2
Thus the effect of the legislation is that individuals whose records are maintained in the files of Federal agencies must be allowed to review

their own records on request, the retrieval must be possible without use

of the Social Security account number, the data maintained in the files

must be timely, and only data necessary in the performance of the agency's

mission should be stored.

For agencies that have relied heavily on the Social Security number for

purposes of retrieval, this requirement will necessitate some major re- adjustments. Further restrictions are imposed on the type of information

that can be solicited from individuals who have requested copies of their

record by the July 1, 1975 guidelines from the Office of Management and

Budget, "Guidelines for Implementing Section 3 of the Privacy Act of

1974," which states that the items published in the Federal Register by

each agency must include:

"...the information necessary to identify the record. Where

the system employs a specialized identification scheme, the

individual should not be required to provide such a number or symbol as an absolute requirement, although the individual

might be requested to supply it if he or she can reasonably

be expected to know it. Instead, alternative combinations

of personal characteristics may be used to identify individuals who may have lost, forgotten, or are unaware of their

identification numbers or symbols. For example, the combination of name, date of birth, or place of birth, and fatiier's

first name may be sufficient to identify an individual without the use of a system identification number.""^

Thus, although use of record identification numbers, driver's license

numbers, etc., is not prohibited, careful attention must be given to the

selection of a set of identifiers that will be considered reasonable in

the particular environment.

1.2 Retrieval of Individual Records

The implications of these restrictions will differ from agency to agency.

It is important, however, that those charged with responsibility for the

selection and implementation of identification schemes be aware of the

retrieval effectiveness of non-unique personal identifiers. The potential

for retrieval by means of exclusive use of combinations of these keys

should be understood, and the relevance of this potential for use with

currently active data bases should be examined. Consideration must also

be given to the question of the reliability of the data contained in

these files since the success of the retrieval algorithm depends upon

the accuracy of the data base itself. Errors may have been introduced

into the data base (during data collection, data entry, data update, etc.).

Office of Management and Budget Circular A- 108 and accompanying "Guidelines for Implementing Section 3 of the Privacy Act of 1974," Federal

Register , 9 July 1975, Vol. 40, No. 32, pp. 28948-28978.
with the result that a request from an individual for a copy of his re- cord might fail due to the presence of erroneous data in the record

itself. In this respect, retrieval algorithms based on Social Security

account number or other standard universal identifiers have advantages

(it is easier to alert clerical staff to the necessity of checking one or two numbers for accuracy than it is to train them to be careful with

all biographical data), adequate retrieval is certainly possible using

non-unique identifiers such as name, birthdate, etc. In fact, such

retrieval is sometimes possible even when the variables most closely

identified with an individual are removed from the records. Statisticians

involved in the collection and analysis of statistical data for research

purposes have been concerned with the problem of protection of the individual whose data is maintained in the files. The need to collect

such data in order to study causes of disease, poverty, violence, migration and other sociological phenomena is well understood, but the individuals involved have the right to expect that information given in con- fidence will be treated with integrity. Dr. Fellegi of the Dominion

Bureau of Statistics in Canada has summarized the problem:

"The public benefits indirectly from the legitimate uses of

statistics by governments, businesses, non-profit organizations, academic users, etc.; yet, the public is also concerned

about the increasing burden of providing the required statistics and about the real or imagined possibility of the misuse

of the data provided by them. The explosive increase in the

demands for more statistics can only be met, without impossible

response burdens being put on the public, through a more effective exploitation of the data. This increases geometrically the

^ magnitude of the problem of checking tabulations for disclosure."

The seemingly contradictory requirements of protecting individual privacy

while at the same time providing the citizen the benefits attendant on the

introduction of automated record keeping systems create a burden for those

responsible for maintaining the systems. They must restrict the data

retained in the file to that clearly relevant to the application, but

at the same time be able to identify correctly all individuals concerned

on demand. Data must be available for research efforts, but information

maintained to support these efforts must be restricted and accessing of

individual records carefully monitored. The dilemma thus created is

discussed further in the next section.

1.3 Statistical vs. Dossier Files

Until recently, it was generally believed that a basic distinction ex- isted between statistical files (those with names, addresses, etc.,

removed from the individual record) and dossier files (those containing

explicitly descriptive information about the individuals). Dossiers

Fellegi, I. P., "On the Question of Statistical Confidentiality,"

Journal of the American Statistical Association , 67 (March 1972),

p. 7-18.

4
were considered dangerous from the point of view of exposure whereas

statistical files were not. James Martin, in discussing this distinction, says:

"It is important to separate the concept of statistical files

from the concept of dossiers about individuals. From the

point of view of privacy protection, they are entirely different. Many of the uses to which the information in government

and research data banks will be put are statistical. In

statistical files the identification of the individual should

be stripped off. Once that is done the files can be used more

freely. It is still necessary to make sure that people cannot

be identified by some other means, such as home location, a high salary, the fact that he has 13 children or cats, weighs

300 pounds, or has a combination of factors that makes him

unique. It is sometimes possible to extract information

about individual

s

from a statistical data bank by asking

combinations of questions. Sometimes a large number of

questions would be needed and controls can be devised to

prevent such interrogation. The controls are more complex

and subtle than on the type of data bank in which details

about an individual are requested directly. In general,

statistical data banks will not reveal the identities of

the persons about whom data are recorded."^

Recent research indicates that the data contained in statistical files i not necessarily protected from unauthorized disclosure. Dr. Schltirer of

the Department of Medical Statistics at the University of Ulm in Germany

gives the following account of his investigation of retrieval from inter

active data banks.

"Until fairly recently, removing name, address, and -- perhaps -- date of birth from a record would secure anonymity

in most cases. The advent of the computer has changed this

situation. It was soon realized that the distinction between

a dossier data bank (returning full identifying information

to the user) and a statistical data bank (providing jnly

numbers of persons) is largely delusive, if the user is allowed to communicate with the data bank by dialogue.

A prerequisite for this intrusion by dialogue is preknowledge. The intruder must have some a^ priori information

from the statistical data bank. The same information must

be stored in Mr. X's record, so that preknowledge and the

corresponding part of the record can be matched. The preknowledge must suffice to identify or, at least, nearly

identify Mr. X. An identification experiment with authentic

Martin, James, Secu'^ity, Accuracy, and Privacy in Computer Systems , Prentice-Hall, New Jersey, 1973, p. 432.

5
data will be described in this paper. It will be seen that

relatively little preknowledge will do for identification

purposes -- at least for the life 'attacked' in this experiment. "7

Not only does Dr. Schltirer's work make it clear that records can be re- trieved through the use of non-unique identifiers, it also gives added

credence to the requirement that only relevant data be maintained in the

files, since inclusion of extraneous data makes the record more vulnerable.

Further indication of the need for such restrictions comes from the re- search in record linkage carried out by Drs. Fellegi and Sunter. They

have developed

"...a mathematical model... to provide a theoretical framework

for computer-oriented solution to the problem of recognizing

those records in two files which represent identical persons,

objects or events (said to be matched) ...A comparison is" to j be made between the recorded characteristics and values in

j two records (one from each file) and a decision made as to

whether or not the members of the comparison-pair represent

the same person or event, or whether there is insufficient

evidence to justify either of these decisions at stipulated

levels of error... A theorem describing the construction and

properties of the optimal linkage rule and two corollaries

to the theorem which make it a practical working tool are

given. "8

The existence of such techniques for linking individual records on the

basis of non-unique identifiers again po-ints up the feasibility of implementing retrieval algorithms based on those variables. An awareness of

the availability of such techniques further clarifies the nature of the ! threats that currently exist to individual privacy. It also emphasizes

the importance of the provisions for relevancy of data in the Privacy

Act since obviously the more data available, the easier such linkages

become. Similarly, the necessity for building audit checks into the

system to provide a means for determining what information was accessed

by whom becomes clear in the light of currently available methodologies.

1.4 Privacy vs. Security

j Privacy has been perceptively defined by Westin as the right "...to

g

determine what information about ourselves we will share with others,"

Schl5rer, J., "Identification and Retrieval of Personal Records from a Statistical Data Bank," Methods of Information In Medicine , 14 (1, 1975).

'Fellegi, I. P., and A. B. Sunter, "A Theory for Record Linkage," Journal

of the American Statistical Association , (Dec. 1969), pp. 1183-1210.

Westin, Alan, as quoted by I. P. Fellegi, "On the Question of Statistical

Confidentiality," op. ci t. , p. 18.

6
where the 'others' are persons or agencies who are presumably authorized

to hold and use such information. Thus the legislative concept of privacy in effect concerns the protection of information about individuals

from misuse by duly constituted authorities, or persons or agencies to

which such authority has been delegated (e.g., for statistical studies).

Security, on the other hand, is concerned with protection of this information from unauthorized 'others.' Such unauthorized access may be deliberate, or inadvertent: e.g., a person seeking information from his own record may be given the dossier of another individual by mistake.

Protection of information in a computerized file from unauthorized access

is partly a technical, system-internal, matter, and partly a procedural,

system-external matter. System- internal protections include obvious items

such as use of passwords and other identifying techniques to guard against

deliberate access attempts by unauthorized persons. More fundamentally,

such protection requires a high degree of precision in the retrieval algorithm to prevent inadvertent delivery of the wrong information record

to a particular requestor (as well as erroneous updates and purges).

Procedural protections involve basic items such as locks and security

guards, as well as requests for proof of identity from persons seeking

information about their own records, further verification based on questions about the content of the record before it is delivered to the re- questing individuals, and so forth. In the case of a computerized information bank where requesting individuals are allowed access via a computer

terminal, a combination of technical and procedural safeguards is required

to insure protection of the component information records.

In a recent article on computer privacy and computer security, Willis

Ware states:

"In the context of computer-based systems, the matter of access

control is an essential part of a larger issue referred to as computer security which can be defined as:

The protection of the equipment, facilities and data

of an information system against deliberate or accidental damage, and against denial of use by legitimate

users, together with the assurance that information

will be delivered by the system only to individuals

authorized to receive it."-'-'^

The phrase "legitimate users" of an information system implies in the

privacy context that legitimate uses of personal information can be defined, and that "individuals authorized" to access such information will

respect the right to privacy of those persons who provided it. This is

Ware, Willis H. , "Computer Privacy and Computer Security," Bulletin of

the American Society for Information Science , Vol. 1, No. 3, Oct. 1974.

7
the core of the privacy issue, which essentially involves the loss of

control over personal information incurred by an individual in providing

such data to some agency or data bank, and the profound effect that re- linquishing control of this information can have on the life of the

particular individual. It is the concern of those involved in the effort

to protect the privacy of the individual to identify measures, legal,

procedural, and technological, by which potentially detrimental effects

of this loss of control can be nullified.

1.5 Summary

In Section 1 some of the difficulties faced by those responsible for the

management of personal data bases in Federal agencies are outlined. Problems inherent in the provision of continued service with no attendant

reduction in efficiency due to the increased emphasis on the protection

of individual privacy have been stressed. The remainder of this report

is concerned with the presentation of methodologies potentially useful

in the minimization of these difficulties.

The application of current retrieval technologies to the problem of

retrieval through use of non-unique personal identifiers is the basic

methodology under consideration. A discussion of relevant retrieval

algorithms is given in Section 2. Section 3 suggests an approach to

determination of the accuracy and reliability of the various identifiers

contained in current files. Forms that might be used in carrying out an analysis procedure are introduced, and a mechanism for arriving at

weighting scores for the individual identifiers is described. Section 4

demonstrates a similar mechanism for analyzing error and omission rates

for each of the personal identifiers contained in the file.

Section 5 describes the probability model developed to assist in determination of the best combination of personal identifiers available for

use as retrieval keys given the idiosyncratic error and omission rates

of those variables within a particular file. An example of the use of

the output from the probability model in making this determination is

given. Conclusions are formulated in Section 6 which also contains a summary of procedures recommended for those involved in the analysis of

personal data files.

Four Appendices are included:

Appendix I: Precision Tables

Appendix II: A Probabilistic Formulation of the Non-Unique Access

Problem

Appendix III: Soft Match Techniques

Appendix IV: FORTRAN Source Code for the Probability Model.

8
2.0 STATE-OF-THE-ART RETRIEVAL TECHNIQUES

2.1 INTRODUCTION

The personal data files affected by the provisions of the Privacy Act

represent a wide spectrum of applications with very different requirements. By definition the files all contain dossier-type data, but they

vary in terms of the non-biographical variables maintained, the ultimate use of the data, the frequency of file access, the retrieval

mechanisms employed, the degree to which accuracy has been stressed,

etc. These distinctions reflect the differing operational requirements

of the agencies involved. Clearly, the provisions of the Privacy Act

giving the individual access to his own records will cause re-evaluation

of file management requirements and, in many cases, some system changes

will be necessary in order to make this data available.

A clear-cut requirement for some system changes exists when the retrieval

keys do not include any of those combinations of identifiers that can be

readily recalled by the individual. Similarly, systems that have placed

a high degree of reliance on the use of the Social Security account

number in the retrieval algorithms will require extension of these system

modifications to insure effective retrieval. But even if these changes

result in the availability of a standard set of biographical variables

as potential retrieval keys, the level of accuracy maintained for those

variables may fall short of that required of retrieval keys. It is

entirely possible that a higher degree of accuracy exists for the variables that have historically been used as retrieval keys than for those

now promoted as candidates for that task. Such a disparity in levels of

accuracy could have resulted from awareness on the part of the clerical

staff of the need to verify the retrieval keys, or from the programming

of special checks on those fields, or the like. Further, this skewing

of levels of accuracy may well have gone unnoticed since the retrieval

algorithm has operated sufficiently well to fulfill the operational

requirements of the agency.

To illustrate this point, consider the case where an agency uses a specific data item, for example AGE, to trigger notification of the

individual concerning a change in status. In implementing and maintaining such a system, the emphasis on manual and system checks of the variables BIRTHDATE and AGE would be greater than that on NAME and ADDRESS.

Indeed, since postmen have become expert at detecting near matches on name and street numbers, the degree of accuracy required to complete

the correspondence is indeed less than that required for retrieval of

the record on the basis of current age.

One of the authors, Mr. Trefftzs , has experienced this phenomenon. His

is an unusual name that causes a great deal of confusion. As a result

it is seldom spelled correctly. Mr. Trefftzs has, in recent weeks,

received communications from a variety of sources (governmental, magazines, professional societies, etc.) in which his name was consistently

9
misspelled in a number of inconsistent ways:

TREVITZ TRAFFT TRAFFTZS TRRFFTZA TREFTZ etc.

These misspellings prevented neither the retrieval of his record nor

the delivery of the message. Yet, if the systems involved were capable

of handling retrieval on the basis of biographical data including name,

and he were to request a copy of his record from each, it is likely

that some of the systems would fail to locate the record, given the

nature of the error that exists in the name itself. This emphasizes

the importance of the change of system perspective attendant on introduction of new accessing requirements. Problems such as gross misspellings of names may block retrieval of certain records until the

level of accuracy of the NAME variable has been brought within reasonable bounds.

Existing file organizations and retrieval mechanisms may thus be entirely

responsive to the needs of a particular agency while being inadequate in

terms of handling the new requirements. The most difficult aspect of

this problem arises from the fact that the required retrieval capabilities may not have been built into the original system. In some cases,

extension of current system capabilities will be sufficient to handle

the new requirements; in others, new sets of capabilities will be needed;

still other situations will arise where restructuring of the files is

required in order to make this data available in the required way.

Decisions regarding the system changes required will be based on several

factors: demand (i.e., the number of requests for this information),

capabilities of the current system (some will be set up in such a way

that required changes will be minimal), characteristics of the data base

(number of non-unique identifiers, available accuracy rates, typical

problems with a given variable), etc. If it is evident that the complete

redesign of the system is required in order to meet the new regulations,

the agency will want to examine data base structures and retrieval

techniques that might assist in optimizing the new system. The re- mainder of this section is devoted to a description of the current

state-of-the-art for retrieval techniques as they apply to the problem

of accessing data using non-unique identifiers. Since there is no single answer to the implementation of these requirements, this section

is presented in the form of a survey in the hope that the availability

of this information will clarify the options available to those con- fronted with the problem.

2.2 VARYING SELECTIVE VALUES OF NON-UNIQUE IDENTIFIERS

Some of the identifiers available in personal data files are highly

individualized. The variable NAME is the most obvious example of this.

Other data items for example, SEX, are binary, and therefore not particularly useful in identifying an individual record. Yet collection of

even the most straightforward items can be difficult since the items

requested are sometimes subject to vastly different interpretations.

10
There is a natural tendency to assume that basic biographical data is

easily obtainable, and that standard definitions can be taken for granted. However, in actual data collection situations, surprising misunderstandings can and do occur and, most importantly, are often not detected

until much later. The result is that variables considered to be reliable

in the file are many times, in reality, only marginally so.

An interesting discussion of the problems inherent in obtaining biographical data is given in the Uniform Hospital Discharge Data Demonstration

Summary Report :

"DATE OF BIRTH: Date of birth is usually an easy item

to collect on admission. However, there are instances

of elderly persons not remembering their exact date of

birth, and others who provide incorrect dates for personal reasons.

SEX: The incidence of encountering a patient with true

indeterminate sex status is very low. Most hospitals

feel the indeterminate category is unnecessary, but

hospitals who perform trans-sexual operations find it a useful item.

MARITAL STATUS: While this item is usually easy to obtain, there are some inherent difficulties in assuring

validity, and these include:

Persons living in common-law relationships who do

not wish to be classified under any of the alternatives.

Divorced persons who consider themselves single

and state so at admission.

Single females admitted for childbirth do not

generally want to be identified as single and state

they are married.

The original intent of this item was to attempt to secure some indication of the living arrangement

of a patient, but it proves to be of marginal utility for this purpose. This is a complex variable

to establish if the many socio-economic factors

which enter into the underlying health care implications associated with living arrangements are considered. "H

Hodgson, D. A., L. E. Kucken, and J. M. Ensign, The Uniform Hospital

Discharge Data Demonstration, Summary Report , Health Service Foundation,

Chicago, 1973, pp. 30-31.

11
2.3 IMPORTANCE OF THE NAME VARIABLE IN RETRIEVAL THROUGH USE OF

NON-UNIQUE IDENTIFIERS

Use, as well as inherent variability, of identifiers will vary greatly

from one application to the next. The variability within groups of

identifiers is probably most extreme for the NAME variable. The following example of such variability comes from a bibliographic data base

application. The report states that:

"...many of the individual data elements exhibit great

variety (i.e., lists of their contents are extensive),

and show relatively disparate distributions. This behavior is encountered in different degrees in regard

to items such as words in the titles of monograph or

periodical articles, assigned subject headings, authors' names and citations. ...In general, the distributions

are approximately hyperbolic, so that a small portion

of items may account for a substantial proportion of

occurrences, while the majority of items occur only

infrequently. -...Of all the data elements, personal

author names exhibit a distribution which is at its

most extreme in one direction. As is shown ...the

most frequent (full name) author name in a file of

50,000 names occurred only sixteen times, while over

35,000 of the names, or over 70 percent of the file,

occurred once only."^^

The same tables show that, with respect to surnames onlyj20,000 or 40%

of the file, occurred only once. These figures emphasize the high

selective value of NAME as an identifier and thus provide the rationale

for the following consideration of name lookup techniques.

2.4 SELECTED STATE-OF-THE-ART NAME LOOKUP TECHNIQUES

A majority of the name lookup algorithms currently in use are based on

a phonetic scheme aimed at minimizing the common transcription problems

in the recording of names. The IBM Alpha Search Inquiry Program description states that:

"Using the phonetic approach for personal name increases

the user's ability to access the alpha search record

even though the exact spelling of a name may not be known.

D. W. Fokker and M. F. Lynch, "Application of the Variety-Generator

Approach to Searches of Personal Names in Bibliographic Data BasesPart I. Microstructure of Personal Authors' Names," Journal of

Library Automation , 7 (2 June 1974), pp. 105-117.

12
Thus the effects of transcription errors, partially

illegible signatures on correspondence, and soundalike names can be minimized, "-^^

In analyzing name lookup techniques, it is useful to refer to the information systems concepts of precision and recall. Recall represents

the number of relevant items contained in a given file which are re- trieved in response to a particular query, while precision refers to

the number of file items retrieved which are actually relevant to the

query or search prescription.

In general, the objective of system improvement is to increase the degree of precision or reliability, without substantially increasing the

amount of irrelevant material recalled or selected from the file.

In a document retrieval system, however, it is rare (in practice, at

least) that there is a single file item which is capable of satisfying

a given query. Generally speaking, several documents will be relevant

to a query, where the degree of relevance is defined concretely in terms

of the concepts used in the query and abstractly in terms of actual

utility to the requestor.

Conversely, in a name retrieval system, the usual case is that there is a unique file item which satisfies a query, although the existence of

other items listed under alternate spellings of the name must also be

assumed by the search strategy. This is a critical issue, which does

not appear to be effectively handled by many of the name search techniques investigated in the course of this study.

In evaluating name lookup techniques for which complete documentation is

available, there are two essential criteria for determining relative

effectiveness. Both of these may seem obvious, but since several of the

lookup techniques described here fail on one or both counts, the topic

merits discussion.

The first basic question is simply: does the strategy allocate similar

names to the same logical group -- and more particularly, are alternate

versions of the same name (Heinz, Heintze) in the same logical group?

The answer is often in the negative, and this is the primary means of

effecting an improvement in reliability of a given method, as we shall

consider below.

The second basic evaluation criterion is the converse of the first:

does the strategy allocate dissimilar names to different logical groups?

Although the possibility of violating this principle appears unlikely,

many name lookup techniques do in fact fail to satisfy this criterion.

Alpha Search Inquiry System General Infonnation Manual , GH20- 1188-3,

IBM Corporation, White Plains, N.Y., April 1974, p. 7. 13
including Soundexj the first widely used phonological ly based system for

name encoding. Most of the systems currently in use have been influenced by the rules established 50 years ago by Margaret Odell and Robert

Russell for the Soundex system.

Knuth summarizes the original Soundex rules as follows:

"1. Retain the first letter of the name, and drop all

occurrences of a, e, h, i, o, u, w, y in other

positions.

2. Assign the following numbers to the remaining letters

3. If two or more letters with the same code were adjacent in the original name (before Step 1),

omit all but the first.

4. Convert to the form "letter, digit, digit, digit"

by adding trailing zeros (if there are less than

three digits), or by dropping rightmost digits

(if there are more than three). "14

This algorithm fails to meet the evaluation criteria described above, as Knuth has pointed out:

"...the names Euler, Gauss, Hilbert, Knuth, Lloyd, and

Lukasiewicz have the respective codes E460, G200, H416,

K530, L300, L222. Of course this system will bring together names that are somewhat different, as well as names that are similar; the same six codes would be obtained for Ellery, Ghosh, Heilbronn, Kant, Ladd, and

Lissajous. And on the other hand a few related names

like Rogers and Rodgers, or Sinclair and St. Clair, or Tchebysheff and Chebyshev, remain separate. But by and

large the Soundex code greatly increases the chance of

finding a name in one of its disguises. "15

The type of refinement that has taken place in development of name lookup techniques is obvious from comparing the results of applying the rules

used in the IBM Alpha Search Inquiry System (Table 2.4-1) with those of

Soundex, using two of the examples mentioned above.

Knuth, Donald E., The Art of Computer Programming, Vol. Ill: Sorting

and Searching , Addison-Wesley, Reading, Mass., 1973, p. 392.

after the first:

b, f , p, V ^ 1 c, g,j,k, q, s,x, z-^2

d, t ^ 3

1 ^ 4

m, n ^ 5 r 6

15 Ibid.

14
Table 2.4-1 IBM Alpha Inquiry System Personal Name Encoding

Algorithm 1^

This routine builds a phonetic key from the last name passed by the

calling program. The phonetic key is 7 packed bytes (14 digits). The

routine uses two tables, a first character table and a basic table.

The first character table (see below) is used to recognize first letters

or letter combinations and give them significance. For example, A in

Armour has a value of 1 to be put in the key. A in Farmer has no value

and is ignored. If the first letter or letter combination does not

appear in the first character table, a zero is inserted in the first key

position and the basic table is used to code the first character into

the record key position.

The basic table (see below) is used to recognize letters or letter

combinations that are phonetically equivalent. Vowels and the letters

H, W, Y are ignored. Letters with the same phonetic value which are adjacent to each other are treated as single letters. For example, in

CK and TT the second character is dropped. However; if a third character has the same value as the previous two, it is retained. The re- mainder of any unfilled key is filled with zeroes.

The first character table used in The basic table used in this

this routine is: routine is:

Letter(s) Value Code Letter(s)

A 1 0 Z,S,CI,CY,CE,TS,TZ

E 1 1 D,T

GF 08 2 N GM 03 3 M

GN 02 4 R

H 2 5 L

I 1 6 J,SH,SCH,CH

J 3 7 C,G,K,Q,X,DG

KN 02 8 F,V,PH

0 1 9 B,P

PF 08

PN 02

PS 00

U 1 W (except WR) 4

WR 04

Y 5

^ ^Ipha Search Inquiry System General Information Manual , IBM Corporation, White Plains, New York, GH20-1188-3, 1974, pp. 41-42.

15
Table 2.4-1 IBM Alpha Inquiry System Personal Name Encoding

Algorithm (Continued) 16

EXCEPTIONS TO BASIC TABLE PROCESSING*

In certain situations where letters or groups of letters have multiple

sounds, a second and third pass through name encoding is made.

Example: CH Has a hard sound in Nichols, a soft sound in Chavez.

1st Pass

(Coded in Record) 2nd Pass 3rd Pass

cz 70 6 0

CH 6 70 0

CK 7 7 6

C 7 7 6

K 7 7 6

DS 0 10 10

DZ 0 10 10

TS 0 10 10

TZ 0 10 10

Following are some examples of the results of coding personal names:

NAME H A R P E R KEY 2 4 9 4 = 24940000000000

NAME C 0 L L I E R KEY 07 5 4 = 07540000000000

NAME S C H U L T Z KEY 06 5 0 = 06500000000000

NAME L I V I N G S T 0 N KEY 05 8 2 7 0 1 2 = 05827012000000

*Occurrences of the letter combinations in this table cause generation

of alternate phonetic keys. When this happens, the lookup algorithm

will use both phonetic keys in the search for potential matches. This

procedure alleviates many of the problems attributable to phonetic missspellings (e.g., Ohrbock for Ohrbach). A cross-reference table is used

to connected sound-alike names (e.g., Lyle and Lisle) which are not

handled by this algorithm.

16
SEARCH CRITERION SURNAME ASSIGNED VALUES

SOUNDEX ALPHA

Assign similar

names to the

same logical group

RODGERS R326 04740000000000 \j 1 / ~ \j \j \j \j \j \j \j \j \j \j

ROGERS R262 04740000000000

Assign dissimilar

names to different logical group

KANT K530 02100000000000

KNUTH K530 07210000000000

In both these cases, the Alpha Search Inquiry System has solved the problem. There are, however, an equally good set of examples for problems

that still remain. Thus, although this algorithm represents progress over that used in the Soundex system, it is far from perfect.

Sometimes quite straightforward algorithms are capable of handling this

problem successfully for files of limited extent. The match rating

approach used by Western Airlines (see summary in Table 2.4-2) would

correctly identify RODGERS and ROGERS as a potential match. In the

Western system, the matching algorithm would compare ROGERS with RGRS.

Thenumber of unmatched characters would be 1, the resulting similarity

rating would be 5, and, hence, this record would be flagged for retrieval.

On the other hand, this algorithm would also consider KANT to be a likely match for KNUTH, which points up the limitations of the system. It

is used successfully in this application because only a small file is

searched at a time. Ms. Gail Hogan, Manager of Passenger Service

Systems and Programming for Western, states:

"Since our reservations system is flight/date oriented

(i.e., we limit the scope of our search by date and/or

flight number), we have little difficulty in obtaining

an exact name match. However, if there are passengers

on a flight with the same surname, we display a list

of these to the agent. If an exact match is not made, we continue processing. .. in order to compile a similar

surname list. "17

Another example of failure to meet the criterion of assigning dissimilar

names to different buckets can be given using the Standardized Phonetic

Frequency Code algorithm (see Table 2.4-3) as described in the NYSIIS

evaluation of name search techniques. 1^ In this system, an attempt was

Personal Communication from Gail Hogan, Manager Passenger Service

Systems and Programming for Western Airlines, September 15, 1975.

'Taft, Robert L., Name Search Technique , New York State Identification

and Intelligence System, August 1970.

17
Table 2.4-2 Western Airlines Surname Match Rating Algorithm

The input surname and each of the PNI [Personal Numeric Identifiers] - item surnames are encoded by this program prior to comparison. Encoding

is as follows:

(1) Deletion of all vowels unless the vowel is the first character of

the surname.

(2) Elimination of all double consonants by deleting the second contiguous usage of any consonant.

(3) Reducing all encoded names to a maximum of six characters. This

is done by retaining the first three and last three encoded characters.

The lengths of each pair of encoded names (input and PNI item) are examined.* If they differ in length by more than two, no similarity

comparison is performed. A minimum acceptable similarity rating is

established for each pair of encoded names as follows:

Sum of lengths is 4 or less; rating of 5

Sum of lengths is 7 or less; rating of 4

Sum of lengths is 11 or less; rating of 3

Sum of lengths is 12; rating of 2

The minimum acceptable rating establishes which PNI surnames are not

"similar enough" to be considered by the agent.

Comparison of encoded names is then performed. This comparison is from

left to right, character by character. Matching pairs of characters are

deleted. This comparison continues until either encoded name has no re- maining characters. All unmatched characters in both encoded names are packed to the right and comparison proceeds from right to left. On

completing these comparisons the number of unmatched characters in the

longer name is subtracted from a value of six with the result being the

similarity rating for that PNI item.

Each PNI item that has a similarity rating equal to or greater than the

minimum rating established for this time will be added to the Retrieval

Control Record [RCR]. This program will add to the RCR until the record

is filled. At that point additional entries will replace other items in

the RCR wnich have lower similarity ratings. If no item with a lower

rating is found, the PNI item will be ignored.

*That is, the length of the encoded input name is compared with that of

the encoded name in the file.

Gail Hogan, op. ci t. 18
Table 2.4-3 Rules for Developing Phonetic Frequency Codes

NAME FIELD

J.KUHNS

G ALTSCHULER

CODE

1, In the name field, convert DK to K,

DT tn T Sr to S KN to N and MN to N

J . KUHNS

G ALTSHULER

2. In the name field, replace multiple

letters with a single letter.

J.KUHNS

G.ALTSHULER

? Rpmnvp vnwpl <^ W H and Y but keen

the first letter in the name field.

J . KNS

G.ALTSLR

4. The first digit of the code is obtained

using PFl*and the first letter of the name field. Remove this letter after

rndina

J.NS

G.LTSLR

13

5. Using the last letters of the name,

use Table PF3*to obtain the second

UIUIL Ui LMC L«L/VJC* 0.0 IMQIljr ICO

t^rs as possible and remove after

coding.

J.N

G.LTSL

16

35

6. The third digit is found using Table

PF2*and the first character of the

Ft vc 1" n^mo RpmnuP fl'fl'PV^ mHinfl

NLTSL

157

357

7. The fourth digit is found using

Table PF2*and the first character

of the name field. If no letters

remain use zero. After coding remove

the letter. TSL

1676

3579

o. me TTTtn digit is touna in tne same _ manner as the fourth using the re- maining characters of the name field,

if any. SL

16760

35797

*Defined in Table 2.4-4

19
made to achieve a uniform distribution of codes across a set of logical

groups. But in the actual implementation, some phonetically dissimilar

symbols were assigned the same Phonetic Frequency code value as shown

in Table 2.4-4.

Applying the rules shown in Table 2.4-3, the names J. Kuhns and 6.

Altshuler are reduced to the codes 16760 and 35797, respectively. However, as shown by the groups of letters associated with the same codes

in Table 2.4-4, 'T. Vines' would also reduce to 16760, and 'J. Butler'

to 35797. Moreover, although these quite dissimilar names would be

represented by the same code, 'Kuntz' -- a variant of 'Kuhns' -- would

not.

Returning to the issue of coding similar names such that they are allocated to the same logical group, it is clear that this principle is

especially critical for alternate spellings of the same name. This

logic is based on the assumption that non-detectable* errors in recording the name of 'Kuhns' may write 'Kuntz' instead. Also, persons

changing their name to a more angl icized orthography and having file

records listed under both spellings should be more easily traceable

if additional phonological-to-orthographic coding rules were introduced.

The NYSIIS coding technique introduces a few such rules -- e.g., KN -> N,

Z S, as well as a number of ad hoc rules to achieve greater reliability for the New York State Criminal justice name inventory. However,

many of these rules are especially aimed at a large population of Spanish surnames and may at best not be useful for files with small populations of Spanish surname records. At worst, they may introduce un- desirable ambiguities, as in the case of 'Risque' in Table 2.4-5, which

illustrates the application of the NYSIIS coding rules given in Table

2.4-6 to a list composed mainly of OSI employees.

Again, 'Kuhns' and 'Kuntz' would result in different codes, whereas the

dissimilar Chinese surnames Li, Lu, Low, Liu, Lao would all result in

the same code, 'L'

.

There is obviously still room for improvement, via the introduction of

phonological-to-orthographic rules based on linguistic -- rather than

ad hoc -- considerations. Moreover, such rules should be developed with

a view to accommodating a variety of ethnic surnames used in the United

States without biasing the coding techniques such that rules derived to

handle one type of surname cause ambiguous coding of other surname types.

*This is based on the assumption that most typographical errors can be

detected by comparing new names to the existing name list for a file

and generating a computer listing of unique occurrences for manual inspection. This of course assumes an investment of computer and human resources for error detection and correction.

20
Table 2.4-4 Letter Distributions for Phonetic Frequency Code Name

Lookup Technique

PHONETIC

FREQUENCY

npni IP

CODE VALUE ASSIGNED

n 1 0c

n4 brD 7 « Q

C rLr

r

A L D E

PFl

7L

1/l\ n

r DD u

LIn

Q u R I N T

V W

YA

S c F A 0 D M G U E

D C9 7L

1/l\ p RD R H N u uV

1

n YA I T1 w

B D F G M R S z

C T L J N Z E

K|-3 K P X H

Q I

V 0

U

W

YMN STN STR

TR SN SR

DRS PRS TN

TD

21
>-

22
Table 2.4-6 NYSIIS Name Coding Rules

1. If the first letters of the name are 'MAC then change these letters to 'MCC

'KN' then change these letters to 'NN"

'K' then change this letter to 'C

'PH' then change these letters to 'FF' 'PF' then change these letters to "FF' 'SCH' then change these letters to 'SSS'

2. If the last letters of the name are

'EE' then change these letters to 'Y^'

'IE' then change these letters to 'Y|5'

'DT' or 'RT' or 'RD' or 'NT' or 'ND' then change these letters to 'D^'

3. The first character of the NYSIIS code is the first character of

the name.

4. In the following rules, a scan is performed on the characters of

the name. This is described in terms of a program loop. A pointer

is used to point to the current position under consideration in the

name. Step 4 is to set this pointer to point to the second character of the name.

5. For each successive position of the pointer, only one of the following statements can be executed.

a. If blank go to rule 7.

if the current position is a vowel (AEIOU)

and if it is E followed by V then change to 'AF'

otherwise change current position to 'A'.

b. If the current position is the letter

'Q' then change the letter to 'G'

'Z' then change the letter to 'S'

'M' then change the letter to 'N'

c. If the current position is the letter 'K' and if the next letter is 'N' then replace

the current position by 'N' otherwise replace

the current position by 'C

d. If the current position points to the letter string

'SCH' then replace the string with 'SSS'

'PH' then replace the string with 'FF'

e. If the current position is the letter 'H' and either

the preceding or following letter is not a vowel (AEIOU)

then replace the current position with the preceding letter.

23
Table 2.4-6 NYSIIS Name Coding Rules (Continued)

f. If the current position is the letter 'W and the preceding

letter is a vowel then replace the current position with the

preceding position.

If none of these rules applies, then retain the current position letter value.

6. If the current position letter is equal to the last letter placed

in the code then set the pointer to point to the next letter and go

to Step 5.

The next character of the NYSIIS code is the current position

letter.

Increment the pointer to point at the next letter.

Go to Step 5.

7. If the last character of the NYSIIS code is the letter 'S' then remove it.

8. If the last two characters of the NYSIIS code are the letters 'AY' then replace them with the single character 'Y'.

9. If the last character of the NYSIIS code is the letter 'A' then remove this letter.

The NYSSIS coding rules are, in several instances, subject to different

interpretations. As a result, implementation in software may differ

slightly from one system to another. This illustration demonstrates the

results of one such implementation.

24
An example of a pragmatically developed name lookup technique is that in use at the Medical Information Bureau. In this system, neither a Soundex nor a phonetic technique is used. Robert W. Keighley, Director

of Systems and Planning at the Recording and Statistical Division of

Sperry Rand, the servicing agent for the MIB, describes the technique

as follows:

"The MIB system is a completely automated on-line batch

oriented name look-up system in contrast to a visual

terminal inquiry response system. The processing of inquiries is not accomplished through use of an algorithm

such as a Soundex or phonetic technique; instead, a name

key is generated (group spelling number) through use of our name dictionaries. These dictionaries of surnames and

given names reside on a disc file. The dictionary is used

only to convert the incoming surname or given name to a unique group number. This group number represents names which are confused with one another. In addition, for

given names, alternate groups are generated for situations

such as nicknames and other confusions which do not necessarily sound like the given name in the inquiry.

In contrast to other popular algorithms which attempt to

accomplish the above, but do not fully, we have manually

grouped our names according to our experience over the

last eight years. This has come about by having to either

search or update at least 160 million records over this

span of time. Needless to say, our dictionaries are fairly complete at this point in time. "20

This technique, used in conjunction with a .highly specialized search

strategy (discussed later in this section), has given excellent results.

Mr. Keighley states that:

"In order to give you some measure of our success, we handle all the situations above (compound names, nicknames, cross reference names such as aliases and maiden

names, etc.) against a file of 14 million records, processing an average of 80,000 inquiries a day. It should,

also, be pointed out that no manual intervention, either

at our computer site or at our subscribers location is

needed prior to conveying the results of our search to

the end user, since we identify the individual with a high degree of accuracy. "^1

Personal Communication from Robert Keighley, Director of Systems and

Planninq, Recording and Statistical Division of Sperry Rand, the servicing agent for the MIB, October 14, 1975.

21

Ibid.

25
This example illustrates the feasibility of developing a highly successful retrieval system based on a name lookup technique. But the high degree of special treatment given to development of this system was a timeconsuming and very expensive process. It is equally important to point

out that successful systems based on modified Soundex rules are also

available: for example, the retrieval system in use at the Department of

Justice in the Immigration and Naturalization Service. In other words,

although the MIB system represents a high level of attainment, there

exist algorithms within the public domain which can be used very effectively.

A fundamental consideration associated with the adoption of any technique

is of course the tradeoff between computer costs for implementing and

executing complex algorithms, human resources for monitoring computer

activities, and the cost of missing a record in a search, which may have

social and legal implications. In view of the latter, it seems more rea- sonable to accept larger selectivity ratios based on name lookup, assuming that other non-unique attributes ca.n be effectively used to filter

lists of file items retrieved by surname lookup.

2.5 IMPLEMENTATION OF NAME LOOKUP TECHNIQUES

The high selectivity of value of name as a non-unique identifier has

prompted the emphasis on name lookup techniques. But it is also true

that this emphasis has repercussions regarding selection of retrieval

techniques. Some of the more sophisticated techniques will not be

easily available due to the nature of possible errors in the data. For

example, it is doubtful that hashing techniques would be useful in the

processing of surnames since a_ misspelling either at data entry or re- trieval request time coul-d result in a complete misdirection of the

search.

Use of name lookup techniques facilitates grouping of closely related

names. Thus, if SMITH and SMYTHE are encoded in such a way that a sort

of the file on the encoded field places them close to each other, the

likelihood of finding the alternate spelling during a search is greatly

enhanced. For example, if the Soundex code appears to be adequate for

handling the mix of names in the file, the approach taken could be as follows: apply the Soundex algorithm to the SURNAME field in all records,

perform a sort on the encoded field, and write the records, in sort order,

on a storage device. The records will be recorded in convenient logical

groups variously called bl ocks or buckets . (Both terms imply the number

of physical records involved in a single read or write operation.)

If the procedure described above were followed, it would be likely that

SMITH and SMYTHE would be recorded in the same, or at least in adjacent,

buckets. Indices would then be formed for use in locating buckets during

a search. In a small file, there might be a single level of index based,

for example, on the Soundex formulation of the input surname, ihe first

two or three alphanumerics of the resulting code could point to a bucket

26
that would be expected to contain the desired record. In a larger

system, a multi-level index scheme might be used with the highest level

pointing to a secondary index containing a breakdown of names starting

with the letter 'S.' In all cases, the indicated bucket will be read

: in and a matching algorithm followed until either an exact match is

found or the contents of the bucket have been exhausted. If no match

is found, the search may continue through use of the preceding and subsequent buckets. In some cases, it may be reasonable to look in logical

blocks that are two or three buckets away since in the case of very

j common names the instances may stretch over several buckets.

j The system developed by the Immigration and Naturalization Service follows this type of approach with the Soundex codes producing the top

level index. The resulting groupings are then further segregated on the basis of the first names. The third level of index, BIRTHDATE,

,1 gives flexibility to the retrieval system. The program is capable of

i handling requests for the records of individuals of exactly this age or for the records of those within bounds of plus or minus nine years. The

user has the option of asking for a count of hits before results are printed in case an unmanageable number of records have been retrieved

j due to specification of a wide age range. 22a obviously this option is for

use by inquirers who are not sure of the individual's exact age and not

by the individual requesting his own record. However, the number of

problems than can occur with the AGE/BIRTHDATE variable make it not un- likely that an individual could be mistaken about how his own age has

been recorded. The handling of such an error could be simplified by

j the availability of a range field.

The search mechanism employed by the Immigration and Naturalization

Service necessitates use of three levels of indices before the actual

accessing of the record(s). The number of required index or file

searches can be reduced through use of encoding techniques to form a compound pointer. A clever approach to using several attributes as a record-key index or compound pointer was developed for the Central

California Red Cross Blood Center. The program, whose main purpose is

to maintain and develop a donor pool of repeat donors, was in operation

at Stanford University at the time of this study.

"Donor records are... stored in contiguous blocks by blood

type, 30/block, and the donor indexes that point to these

records are stored 255/block. By this method of indexing,

the indexes themselves can be sorted by blood type, date

of last donation, etc. relatively easily so that one set

of donors can be dealt with individual ly. "22b

i^Zapersonal Communication from Robert Robinson, Director of ADP Systems

Branch, Immigration and Naturalization Service, Department of Justice,

September 22, 1975.

22bLudwig, H. R., "An Interactive Computer-Based Donor Management System,"

Computers in Biology and Medicine , 5 (1975), pp. 69-75.

27
The donor index contains the following attributes:

- a two-byte donor i.d. consisting of the first three letters of the last name and the birthdate. This information is reduced to two bytes through use of the following

algorithm:

3

Key = E (a+26^"'')+0-2400

i = l

where a^. denotes the numerical value of each of the first

three letters of the last name, e.g. A = 1,B = 2, ...and

J denotes the Julian value of the birthdate with the base

beim 1900.

- a two-byte pointer that specifies both the physical block

and the logical record number. For the current file,

this is a number between 1 and 29,940. The organization

of the file is such that this number also implies blood

type

.

- a two-byte data field to indicate date of last donation.

To reduce field size, this is a Julian date from some base year (in this case, 1972).

- two one-byte fields for coded information: number of

entries on the elioibility list, total donations to

date, indication of rare blood types, etc.

The system has been designed so that updating of some levels of information can be handled by reading in only the index level, and, when a donor record is required, it can be fetched directly.

A very sophisticated example of use of an encoding technique occurs in

the MIB system. This system places a high premium on accuracy of

retrieval. Dictionary lookups are performed to obtain group numbers

both for surname and given name. Mr. Keighley has summarized the search

algorithm as follows:

"The process of looking up an individual using surname, given

name, date of birth, place of birth (optional) and territory

of residence (optional) is as follows:

1. Look up surname in surname dictionary to obtain its group

number.

2. Look up given name in given name dictionary to obtain its

group number and any alternatives (nicknames etc.).

28
3. Generate a key consisting of surname grouo number, given name group number, date of birth (coded), place of birth

(optional-coded), and territory (optional -coded)

.

4. Using the generated key from Step 3, search the data base

on a direct access basis (index sequential) for records

applicable to the inquiry.

5. Screen each record in detail and mathematically determine

what the degree of probability is that the record being

screened pertains to the person being searched.

6. If any record being screened has a high enough probability, it is selected as a response to the inquiry.

In this instance the encoding technique has not cut down on the number

of required accesses, but has instead been used to generate a very

accurate filter.

2.6 OTHER SEARCH STRATEGIES

Analysts considering potential system changes will do so in the context

of the operational environment of their agencies. In some instances,

no great emphasis will be placed on search strategy. Yet, in other

situatipns, particularly when the file size is large, the selection of

an efficient search strategy will be crucial to effective system performance. The number of requests to be processed, batch/interactive

capabilities of the system, size of the file, etc., will be determining

factors in these decisions. A general discussion of some available

search strategies is given here as background for those who must concern themselves with this issue.

W.A. Burkhard and R.M. Keller have described an approach to the problem

of "...searching the set of keys in a file to find a key which is

closest to a given query key... Three file structures are presented together with their corresponding search algorithms, which are intended to

reduce the number of comparisons required to achieve the desired result. '"^'^ They describe their result as follows:

"The study described here is concerned with the general

problem of efficiently searching files in the following

situations: (1) find a key in the file closest to a given query key, and (2) find all kevs in the file

Keighley, op. ci t.

W. A. Burkhard and R. M. Keller, "Some Approaches to Best-Match File

Searching," Communications of the ACM , 16, (4 April 1973), p. 230.

29
closest to a given query key. By 'closest' we mean ac- cording to some suitable measure of distance, specifically

a 'metric' in the mathematical sense. These situations may

arise in information retrieval applications in which members of a file are keyed to a number of numerically-represented attributes. Our search algorithms have the

following common basis: let b be the 'best' key found at

a certain point in the application of the algorithm.

Based on certain 'cutoff criteria' which depend on b, subsets of tne file remaining to be examined are eliminated

without explicitly comparina the keys in these subsets

with the query key. Our experimental results (on randomlygenerated files) indicate that large segments of the file

may be eliminated from consideration using these cutoff

criteria. "25

Abraham Bookstein has described a hybrid search technique which

"...has the advantage of retaining the simplicity of search keys while

also including some of the flexibility that Boolean expressions of key

words have for uniquely defining an item, ...The only indexes that

must be maintained are the hash tables; the other indexes ... are replaced

by the search algorithms. "26 Bookstein goes on to say:

"A user would begin by entering into the system search key.

If the system finds that the number of items that would be

retrieved exceeds a preset threshold, it would output a message requesting that the user enter a set of key words taken

from various fields in the records; ...The system first generates a subfile of records having the desired search key. If

a hashing technique is used, constructing this subfile can be

accomplished quickly and at a relatively little cost in space

for tables. Once the smaller file is formed, a complete

search of the full records can be made for the key words.

Since the system operates in two phases, it is less sensitive

to the number of records the search key retrieves as far as user considerations are concerned. Ease of use becomes the

dominating objective in designing the search key ... In the hybrid system, we can think of the search key not as an access mechanism ... but rather as a file reduction mechanism. This

system trades the cost of maintaining and storing large indexes

for an increase in costs of computer processing; only relatively

easily maintained hash tables for fixed length search keys need

to be maintained. "27

^-" Ibid. , p. 236.

^^Abraham Bookstein, "A Hybrid Access Method for Bibliographic Records,"

Journal of Library Automation , 7:97-104, (2 June 1974), p. 99.

^^Ibid.

30
The use of Malcolm Harrison's hash technique to expedite the search is

explained as follows:

"A fixed number of bits, or signatures, (is) added to each

field on which a search can take place; these additional

bits are derived in a well-defined way from the original

field. This subfield is a fixed-size representation of the

full field in a form that can be used to very rapidly eliminate most records which would not pass the key word matching

test. It is stored in the index to the file along with the

address of the record. Though this Dreliminary test is not

foolproof, it could considerably reduce the size of the subfile that requires a more costly complete search, thereby

reducing the number of disc accesses. "2°

The author quotes a false drop rate of approximately ten percent for the

bibliographic application being described. This is of course too high

a rate for personal data file retrieval systems, yet a careful implementation of a similar combination of such techniques might be appropriately

applied to the retrieval problem at hand.

Retrieval techniques described in this section were selected because of

their relevance to the present discussion of use of non-unique identifiers

in search algorithms. Those interested in pursuing a broader range of

ij retrieval techniques might begin with Dennis Severance's generalized

J mode] for exploring the relationship between alternative search technl-

; ques^^ and Knuth's work on sorting and searching30.

29

I Dennis G. Severance, "Identifier Search Mechanisms: A Survey and

i Generalized Model," Computing Surveys , 6 (3 September 1974), pp. 175-194.

Knuth, op.ci t.

! 31
3.0 IDENTIFICATION OF WEIGHTING FACTORS

3.1 ACCURACY CONSTRAINTS IMPOSED BY THE PRIVACY ACT

One of the most important facets of the privacy legislation is the

imposition of accuracy constraints on the agencies maintaining personal

data files. The intent of these provisions is to protect the individual's

privacy by insisting that data pertaining to him be correct, up-to-date,

and relevant. The new law gives the individual the right to review his own record and to request that any relevant corrections be made. Disputed

information maintained in the file must be so identified.

This emphasis on accuracy of personal data held in computer files is a function of data availability, not of an increase in error rates due to

computerization of the data. Manual record-keeping systems have, in

general, a higher error rate than computer systems. Susan Wooldridge,

et aT have stated that an error rate of up to 10% is not unusual in

paper-based files. "Indeed a frequently used justification for computerizing is to raise the accuracy of the files. "31

Alan Westin has quoted Dr. Collen of Kaiser-Permanente as indicating that

manual systems in the hospital setting are plagued by errors.

"Errors have become so common in traditional medical records

that physicians are accustomed to handling them, from finding

a woman's lab test in her husband's file, to prescription

errors in the hospital. "32

Dr. Collen went on to say that, after installation of a computerized

record-keeping system, they had found that:

"...some 10 percent of our computer records contain 'errors.'

We don't know what the error level in manual files is, but

it certainly couldn't be less. Gradually we hope to get

the computer file error level down to around three percent.

To get to 0 percent would be prohibitively costly, and

probably isn't possible, anyway. "33

Before the emergence of computerized files, few organizations took time

to study their own systems from the point of view of accuracy and possible

means of improvement. 34 There was far less concern with the problem, to a

Wooldridge, Susan, Colin Corder, and Claude Johnson, Securi ty Standards

for Data Processing , John Wiley and Sons, New York, 1973, p. 60.

32Westin, A., Databanks in a Free Society .. Quadrangle Books , 1972^ p. 210.

•'''ibid.

Ibid , p. 433.

32
great extent because clues other than the data itself were readily available. These clues took the form of the handwriting in which data was recorded, the color of the form used, the placement of the paper in the

file, the age of the document, etc. In many cases, the person reviewing

the data was conversant with the general structure of the file, and often

even with the individual case. He thus brought his own background to the

perusal of the material.

Automation has had the effect of depersonalizing the data, reducing it

artificially to a level of uniformity that masks the disparities in

accuracy while at the same time making it readily available to a broad

spectrum of users. The loss of visual clues such as ancient appearance

of the document or illegibility of the data is particularly important

from the point of view of timeliness of the data maintained in the file.

James Martin, in his book entitled Security, Accuracy, and Privacy in

Computer Systems , has discussed this problem.

"In addition to patent errors, large files also accumulate two

other kinds of troublesome material --the decaying and the un- evaluated. The former is characteristic of biographical details.

Information gets less reliable the farther away it is from the source. References and testimonials, to say nothing of college

degrees, lose their relevance as their subject grows older. The

facts remain facts in the environment of their collection, but

they may be inappropriate in the context of the use to which

they are put. "35

The decay factor inherent in much biographical data might be thought of

as the length of time during which the data is more likely to be right

than wrong. For some variables, such as birthplace, there is no decay.

For others, such as current age, decay is at a constant rate. For still

others, the amount of decay will depend upon the time at which the data

was collected, e.g., the variable HIGHEST DEGREE ATTAINED will have a much greater potential for change if it refers to a student than if it

refers to a professional person.

Form 3.1-1 identifies some of the standard biographical data items that

are subject to this type of variability. The privacy legislation has

emphasized the importance of the timeliness factor since clearly much of

this data deteriorates over time. In the context of the current discussion, this factor is an important indicator in the assignment of weighting

scores to be used in a final determination of selection of non-unique

identifiers for retrieval algorithms.

Martin, J., Security, Accuracy, and Privacy in Computer Systems , Prentice-Hall, New Jersey, 1973, p. 431.

33
Form 3.1-1 Decay Factors of Standard Biographical Date Elements

NON-UNIQUE IDENTIFIER

DECAY FACTOR

Does this variable remain constant

over time?

YES* NO**

LAST NAME

MALE /

FEMALE

. /

First Name /

Middle Name /

Sex /

Birthdate /

Birthplace /

Marital Status /

Address /

Occupation /

Education /

Physical Characteristics /

*Changes are rare *Changes are not unusual

I

34
3.2 DETERMINATION OF WEIGHTING FACTORS FOR EXISTING FILES

In the establishment of a computer file, errors can be introduced at any

stage of data handling. They sometimes result from the individual's

misunderstanding of a question, sometimes it is a transcription error on the part of the clerk filling out a keypunch form, sometimes it is a problem in the file management system that creates or updates the record.

A determination of the likelihood of such errors having occurr-^d requires

evaluation of procedures followed during the key stages in data handling:

1. data base definition and forms design

2. data collection techniques

3. keying of data and input controls

4. computer edit routines

5. manual accuracy check of record as printed by the computer

Thus, an acquaintance with the evolutionary process through which the

file came into existence is essential to an evaluation of the degree of

accuracy of the data it contains. A comprehensive examination of this

evolutionary process should answer such questions as: is the data

contained in the files consistent? (i.e., did all of the individuals

who filled out the forms understand the same thing by the questions?

Was the question asked the same way each time or has the wording changed

significantly?) and: which data items in the file are likely to be

most reliable?

The following sections describe each stage of data collection in terms of

appropriate error detection procedures. Acknowledgement of the possible

existence of such errors is important, but, since data base deficiencies

will differ greatly from system to system, it would be helpful to be able

to characterize these weaknesses in more specific terms. One approach

would be to assign weighting scores to the various biographical identifiers

in the file in such a way that the weights serve as indicators of the

adequacy of the collection procedures for each variable. In the following

discussions, a vehicle for making such a determination has been suggested.

Included with the description of each stage of data collection is a table

in which YES/NO questions are postulated for each of the problem areas identified. These questions are to be asked for each of the biographical

identifiers used in the hypothetical file under consideration. A summary

chart is used to record the total number of NO checks for each of the data

elements. These totals then become the identified weighting scores for

the various data items and thus produce a gross picture of the validity of

the biographical identifiers in the file.

The weights thus arrived at for each of the standard biographical data

elements will be used in a final determination of identifiers for the

retrieval process (see Section 4).

35
3.2.1 Data Base Definition and Forms Design . The determination of an appropriate set of data items to be included in a system is an important

part of the design. If the items requested are inappropriate or the

wording of the question obscure, difficulties arise which are not obvious

from looking at the data. The importance— and the difficulty--of obtaining such uniformity of data is discussed in the Uniform Hospital Discharge

Data Demonstration report. This project was directed toward improvement

in health care delivery through collection and evaluation of discharge

data from a large number of hospital facilities throughout the country.

A subcommittee of the U.S. National Committee on Vital and Health

Statistics handled selection of the basic data set. Collection of the

data was carried out systematically, with personnel at the hospital sites

being trained with respect to abstracting of data items from the charts,

and quality control checks implemented tnroughout the data collection

procedure.

"In all instances, the system manuals used in the test hospitals were modified to conform the UHDDD manual ... Coding examples were

provided to elaborate on the individual items and to cover anticipated contingencies such as when the date of birth, ZIP

code, or married status was unknown, when patients from foreign

countries who do not have ZIP codes were treated, etc. Examples

to clarify the concepts of the principal diagnosis and the

principal procedure were also given. "^^

Even so, many data collection problems have occurred. For example, the

categories established for MARITAL STATUS are:

"Now Married refers to persons who state they are married and

not separated. Divorced or Separated is used for persons who

state they no longer live together, whether or not legal action

has been taken. Never Married (Single) refers to persons who

state they have never married or whose only marriage has been

annulled. Widowed includes widows and widowers. "3'

Yet, as noted in Section 2.2, there were difficulties in collecting even

this very well-defined data in the following instances:

"Persons living in common-law relationships who do not wish to

be classified under any of the alternatives. Divorced persons

who consider themselves single and state so at admission.

Single females admitted for childbirth do not generally want

to be identified as single and state they are married. "^8

Hodgson, D. A., L. E. Kucken, and J. M. Ensign, The Uniform Hospital

Discharge Data Demonstration, Surrmary Report , Health Services Foundation, Chicago, Illinois, 1973, p. 24.

-^^ Ibid , p. 12.

^^Ibid, p. 31.

36
They conclude:

"The original . intent of this item was to attempt to secure some indication of the living arrangement of a patient, but it proves

to be of marginal utility for this purpose. This is a complex

variable to establish if the many socio-economic factors which

enter into the underlying health care implications associated

with living arrangements are consi dered. "39

Form 3.2.1-1 contains an analysis of the inherent characteristics of a sample set of biographical data elements. The results indicated in the

form reflect good experience, but it is assumed that counter instances

could be found. The analyst should compare his own evaluation of similar

elements contained on the forms used in his data collection procedures

with these results.

The data requested in Form 3.2.1-2, unlike that shown in the earlier

forms, is dependent upon the actual collection procedures involved and

is, therefore, left empty. The analyst is encouraged to produce similar

tables, using the identifiers relevant to his file, and then, using a selection of random records from the data base in conjunction with the

forms on which the original data collection took place, to answer the

questions in the table. The answers will supply the required weights

for this stage of the data collection procedure.

3.2.2 Data Collection Techniques . Perhaps the best possible guideline

for successful data collection would be: capture the data as close to

the source as possible. This might equally well be stated as: the fewer

manual transcriptions of the data, the cleaner the data. The reasoning

behind this is that the individual is normally the person best qualified

to monitor collection of information about himself. He would not be as likely, for example, to transpose numbers in his street address as would

a clerk whose job is to transfer his descriptive data onto a keypunch

form. Assuming this is a reasonable generalization, an ideal data collection system would then call for the individual to enter his data

directly onto a keypunch form (which need not look like the standard 80

column form, but which must be marked with column numbers that are re- cognizable to the keypunch staff), or, in some cases, for the individual

to interact with the computer, via terminal, in a question/answer dialogue. If the questions are easily understood, if they are available in

the language spoken by the individual, and if he prints (or types, if a terminal is used) acceptably well, this may indeed be the best way to

capture the data.

37
FACTOR

easy

to

rately?

o

rENCY data accu

lements

CONSISl Is

the

record

YES

tics

Gf

Biographical

Data

E

RECOLLECTION

FACTOR

Is

the

data

easy

to

recall?

0

YES

1-1

Inherent

Characteris

RECOGNITION

FACTOR

Is

the

meaning

of

the

variable

easily

understood?

0z:

YES

ro

Form

NON-UNIQUE IDENTIFIER

MALE

FEMALE

UJ

ATUS

STICS

LAST NAME

FIRST

NAME

MIDDLE

NAM

SEX

BIRTHDATE

BIRTHPLACE

MARITAL

ST

ADDRESS

OCCUPATION EDUCATION PHYSICALCHARACTERI

38
COo

s-cu T3 1— 13

13 • <+- CD

<U • UJ

fOO

lA "O

<U OJ -a -r- o M- O -i-o

O) d)

S- CL

"IT

^§s§

a>

s-

»a O) o ^ I—

I— o- <: T3

ZD +-> O </l (_) •- O <—

-4->

W -r- OJ O E

(O JZ C -(-> •f— -Q S

s13 (/) CO :3

CNJ OOcr>

to

a> +

I— *

c: "O <C Oo

(/) 2 o +-> _l CO

OJ

C 3

ro

O to CO o <j »a >

LlJ >- i CD CD

to I— c

>>x» -I- cr> to fO 1— c

Q-TD

O *

OJ fOC— C^' ^ CJ fO to

+-> j:: >, OJ E S- E

CO O) <4- O) (O I—I +J O > C a CD E I— O E

Q. fO E -c: ou to

CD

OJ E

S- fO

OJ I—

s- -o

OJ c

-E fO -P SZO

(T3 ti- . to CD CD

to

OJ toOJ " E

to c^. OJ cu cu^ . E "O u to

rC (O CU

=3 OJ

O

to oa 2:

C/1 LU>-

C7> S- r— CU E O

to E O Q.-E -I- -1- OJ E -I- 4- E -M +-> O — n3 TD (T3 CU-r-i— O) X cncU4->

x:4->'r-x: <u E"0 o)

+->

O 4- +-> -I- E i- <US_S-+J+->04->S-. S^-MO^-i-J^EO)

=a: to4- o s tOT--4-> I E

tn

uu

>-

T3

to OJ

03 to OJ

OJ E

13 fO

to <T3 CT to

•I- Q} -E E S- O) -MO -E

•I- E +-> C^' to +-> O) >^

fO ra O) E fC rn E -Q >- 3

C/1 UJ>~

CO

LUo- > O

Q

UJ_l

CO

Q

XUJ

tn

Q

7SZ I—q:I—

CD I—CQ

I—00

l>0 I—

UJQ

=3Oo o

<:

39
The problem is usually not so straightforward, however. If any ambiguity

exists in the wording of the question, or if coding of the data is re- quired, it may be far more relevant to have the forms filled out by

trained interviewers who understand the intent of the questions and can guide the individual in determining what is for him, the appropriate

answer.

These generalities concern data collected specifically for entry into

the computer. There is another set of instances which involve collection of data after the fact, as in the case in the Uniform Hospital

Discharge Data Demonstration summary . Here existing medical records are

being assigned to the abstracting task. The methodology for this

abstracting procedure has been carefully laid out. Even so, the accuracy

checks carried out by means of a re-abstracting procedure for the data

collected in Months 1 and 4 at each hospital in some cases reflect a surprisingly high error rate.

In the following paragraphs, the re-abstracting procedure is quoted as it appears in the project manual, along with the summary rates of errors

that occurred.

"The demonstration design called for two samples of medical

records to be re-abstracted in each test site. The first re- abstracting was designed to compare the data produced by

applying the UHDDD definitions to the data generated from

the same medical records using the definitions in effect

prior to the demonstration. The second re-abstracting com- pared the data produced by the hospital during the fourth

month of the demonstration, with the data re-abstracted by

the project medical record librarians. . .Table 2 provides a summary of the discrepancy rates for individual items from

the second re-abstracting analyses. In almost all instances,

the errors with items having low discrepancy rates were the

result of clerical errors; e.g., an error in transcribing

data from the medical record to the abstract.

40
Table 2 Percentage of Abstracts with

Discrepancies by Test Sites

ITEM MAINE PENN. WIS. CALIF.

PERSON I.D. 0.1 0.6 NA* 0.1

DATE OF BIRTH 0.3 1.2 0.7

SEX 0.8 0.6 1.2 0.5

MARITAL STATUS 1.0 0.8 1.8 1.1

RACE 0.2 0.4 1.0 0.5

ZIP CODE — 1.1 2.6 0.5

ADMISSION DATE 0.1 — 0.3 —

ADMISSION HOUR 1.3 24.0 15.5 2.0

DISCHARGE DATE 0.1 0.2 NA —

ATTENDING PHYSICIAN 0.4 1.4 11.6 4.1

OPERATING PHYSICIAN 0.1 2.4 19.7 NA

PRINCIPAL DIAGNOSES 8.3 11.8 10.7 NA

OTHER DIAGNOSIS 14.6 21.0 30.5 NA

PRINCIPAL PROCEDURE 1.9 6.5 22.4 NA

OTHER PROCEDURES 1.5 9.3 15.8 NA

DATES OF PRINCIPAL AND

OTHER PROCEDURES 0.1 7.4 18.2

SERVICE TO WHICH ADMITTED 2.6 3.2 3.7 2.5

DISPOSITION OF PATIENT 0.4 1.2 3.9 0.4

PRINCIPAL SOURCE OF PAYMENT 3.7 2.2 1.6 2.7 40

*Not Available

Obviously the principal difficulty in this data collection procedure is

in the training of clerical staff charged with properly interpreting the

available data. C. R. Newing, in discussing data collection problems in

the insurance business, points up the necessity of checking data collection procedures and tracing errors back to the point of origin.

"In our efforts to control quality, training of clerical staff

plays a large part particularly as most of the data sheets

which we use are quite complicated and contain a large amount

of information in coded form. We have found it worth while to

return documents which contain errors to the originator and

while this is not popular it does seem to be having effect.

There was a time when 20 percent or so of documents contained

errors but we have reduced this to around 5 percent... Having

adopted the principle that the files which we hold are the

responsibility of the user departments as far as content and

accuracy are concerned, we co-operate in helping them to apply

any checks which they may wish to operate. "41

Ibid -, p. 38.

Newing, C. R. , "Data Arrangement and Checking in the Insurance

Business," Applied Statistics , Vol. 2, No. 1, 1972, pp. 45-52.

41
In anotlier paper on a similar subject, W. F. Kertisley emphasized the

detailed analysis required for data that is initially "crude" in form.

He reported on a survey directed at collection of "...statistical data

on monetary transactions in the personal section." Data collection

procedures called for family interviews as well as preparation of a 14-

day diary by the family. Many problems were encountered by the editors.

"Some deficiencies become obvious as soon as the entries are examined; others come to light when data in one part of the

budget are compared with another part. Some inconsistencies

are found in comparisons between diary entries and interview

data; others when interview data are compared with individual

or family circumstances. "42

In general, he felt that the necessity for making editing changes had

resulted from:

"(a) duplicated information;

(b) difficulties in applying definitions;

(c) incomplete or inconsistent information;

(d) timing of transactions;

(e) changes in household composition."'*^

Form 3.2.2-1 contains a set of questions relevant to the methodology of

data collection for each item. If the information contained in the file

was handled differently at different stages of evolution, the analyst may

want to fill out two sets of tables, or he may choose to use the latest

methodology. If he does this, he must remember that his final results

do not fully reflect the status of the current file.

3.2.3 Keying of Data and Input Controls . The entry of data into a com- puter file is accomplished in one of two ways: interactively, via

terminal operating in a real time environment, or batch, with data being

keyed ahead of time to cards, tape, disk, etc. Error rates for these

methods tend to be in the same general range (from 1-4 percent). Consequently, it is the degree of control placed on the overall handling

of the data by the system that makes the difference, and not the choice

of keying device. Entry of data via terminal, however, creates an entirely different set of problems. In this case, control is a function

of system efficiency and error rates will depend on the degree of

sophistication of the programs themselves. James Martin has discussed

this difference in approach:

^^Kemsley, W. F. , "Pre-Computer Editing of Budgets for the Family Expenditure Survey," Applied Statistics . Vol. 2, No. 1, 1972, pp. 58-64.

Ibid.

42
4-> C

O)E

0) UJ

(0

4-> «o Q

«0

Q.

ro

scx> o

CO

i~o

I/) S-o

4-> o

<a

Ll.D)c

•r- +JJC

(U

S- o(Uoo

i- D.

4-» UO

(0

(0 aI

roo

U- coc

<u

s- +-> ^ CD S- +J C O

•I- Hl/l O 4-

•—I CT) CD

O

O) 4- E '4-

•1- 03 E +->

•1- S_ 00

fO

O

S- <4- r—a

•r—s_

O)

CDE

S->ooI

-M-o

0)

O

S0)C

fC

•4-> J2O

+-> fO E i- E 1/1 CD 3 ^ Q. U fO O I ^

T3 OJO

J- O) C^- ^ -o

fO

U <U

00 cn sfO E O

I— <U

fO -E (O E -(-> 4-> •I- fO CD 00 T3

•r- ro

s-o -o o

003

I/)

(T3

QJO >>

S- s. O E

in 0)

n3

4-> -o

oo

(t3 o -oE ^ T3 fO E

-M T3 +-> E O) 4-> •r— D. O 'r— S- >5 E S- Q.+J 2 E E

>,'i- E -r- C^.

O 4-> r— >, <U 3 (O jD S O 3

O) -o S- J= -O •!- O

4-> O) >

I— -r- 4-

_

OO I— -O r— +J

fO E a; E 3 <+- •<- 00 TOE _ (U

<U 00

I- <D > SS- Q.

0/1 LlJ >-

OO

UJo

CO

UJ

OO

UJ>-

to

UJ

>-

UJ

=> UJ O Q

00<

00

ad

UJo XUJOOQ

I—

q;

I—t <

Q.

a:

H-

CO

00

h-

•sc I—

00

a:

00

UJQo <

(_) oo

00o

00

UJ < 1-

c_> OO ^ >- < :c X

Q_ o

S-o

<+-

CD

+-> fO

s-fOQ.

O)

OO

fOo•»-> -a

O)

SS-O) ^-E

(OS-

-!->

00

n3

-Mo

+J

(Jo

4JE

UJ* 43
"In some systems a11 information stored originates from the

terminal operators. Sometimes the terminal operators work in

a fairly casual manner, compared with the card-punch operators

and verifiers of batch data processing. Clearly the viability

of the concept of building up a data base in this way depends

upon whether we can control the accuracy of the terminal input,

catching the errors that occur.

"On certain systems the errors are cumulative. The files contain information about a set of items that is kept for several

months and is updated periodically by terminal operator actions.

If occasional operator actions cause errors in the files, as the months pass by the files will steadily collect more and

more inaccuracies. This situation could clearly bring the

system into disrepute, and controls must be devised to prevent

it.

"A number of factors make real time systems worse than batch

systems for the control of accuracy. First, there are likely

to be more terminal operators creating the input and they are scattered over many areas. They tend to be more diverse and

less controllable than the operators in a keypunch room. Second, the verification operation found in a keypunch room

is usually not employed. Third, batch totals and other batch

controls often cannot be used, as the transactions originate

singly, not in batches. Fourth, equipment failures will be

experienced. It is often when a terminal, line, or computer

fails, or during the recover period, that errors originate.

"We do, however, have one factor that is strongly in our favor

in real time systems. This is that in an appropriately designed

diaglogue most of the errors made can be caught in rea l time

as the operator makes them. The mistake or discrepancy is then

rectified on the spot."^'^

Because of the differences in approach between batch and interactive

systems, the respective weighting factors are being handled separately.

(See Form 3.2.3-1 and 3.2.3-2).

3.2.4 Computer Edit Routines . Checks by computer program of value

ranges, formats, data consistency, etc., not only have the advantage of

allowing for rapid processing of the data, but further act on data that

has already been stored in the computer file and is, therefore, past most

of the stages at which new errors are introduced. Susan Wooldridge et al

.

comments on the importance of this process.

44,Martin, James, op.cit. , pp. 70-71

44
cnc

•r— -PCD

<u

1—O +^

$- +JE

O 1—

CJ

+-> o

3 +-> Ql m

CQ

1—

5- o O

c 4-

ft3 l/) a> i_ c O •1— -M >> u

Its Ll_

I—

1 ro

COE

S-o

LL.

-o U CO u to

d) .l- 3 -a

GO

LjJ >-

-o o

+J (C U ^

3 u

Q.-0 tu E (1) -Q to

•1- ^ .— O O) ro to -M +-> (C n3 C O 3 S (-!

00

UJ

>-

1 to OJ Oi

-(-> o

(O T3 S4-> (U M- QfO T- O

-a 4-

•I- -i-> 13 a

to S- S- Q-Sro OJ fO C :2 3 > Q.T--a

00

UJ cc: ZD LU cy I—

2: LU O Q

LU

LU

_Js:LU

OO

LU

XLUCO

{—4 CQ

LU

I—

t

CQ

oo

^—<

I—

CO

oooo

UJQQ

o

n.ZDO(_) o

oo

oo

oo

1—

ce: LUO

=c

<co

45
c

•r—

C7>4->

•r—O) Q.

3:C1—1

"o <u

s_ >

+J rc: +-> o O

C_) fO

i-

+-> OJ

rs -*-> a. c c 1 1—i

s- "O o

fO

t/l cn i- c o

>> o

cu u_

(/) o

S-

-»-> •r— c:o s u

cu

ou cnc

no O" u

<D o c: fd fC 0- u I/) OJ E

S- o O)

CD +-> 2 •r4-> S- fO

Oi -M

S- > fO < O -o

00

>-

0)

(T3 -E

+J -M

n3 s -o o OJ ^ -t-> fO •r—

to O) cn E CU to (/) •n- S- -M

C7> o fO O -M o

S- Q.

Q. i- Z3 o

O) 4-> CU fO s-

+-> s- o

cu 4- o Q. <u Q O

t>0 UJ>-

cu

-)->

CT

CU

OJ o

CO C^' CU cu

cuO fO

s- >

ct a. to LU

to +J

to a

CO

(O

O +-> OJ -O =5 S- <U +J

Ct_ (0->-

d ~ D. C

t- CU

O > to +J CO

UJ

>-

UJ Of:

z: UJ O Q <s:

I— UJ C>0

UJ

—JQO

XUJ

UJI—

<:o

rc

hq;

I—I

CO

UJ<

a.

zrz I—

Qe: CO

c/> ZD

s:

to

UJQ

Oo o<oaUJ

c/1

t/1 q;

UJ < I t-5 O >—I 1 to ( > <

46
"The first program in any system should be an edit, or a verification program. All data for a system should go into one simple

edit program, if at all possible... The basic principle of the

edit program is that it detects all errors that are logically

possible to detect, including - or perhaps especially - rare and

unlikely ones, for these are the errors which, if allowed to pass

into the system cause the most trouble later on."45

Programmed checks will, of course, reflect the characteristics of the

data in the file but may include format checking, (is there a number in

the numeric field?), range (is the age given as greater than 99?),

internal consistency (do the birthdate and current age agree?), reason- ableness (would someone really have 30 children?), etc. In some cases,

an error situation is obvious as in the case of alphabetic data occurring

in a numeric field. Where a determination of reasonableness of the data

is required, the computer program may not be able to make a final

determination. In such case the data must be flagged for further action

by the data processing department.

Other important factors in determining the likelihood of errors in the

file are the length of time for which the computer editing program has

been available as well as consideration of the points in time when

improvements have been made in its implementation. If only part of the

data has been run against the edit program, a first step in data cleaning

may well be to run the entire file through the editing routine to assure

that all obvious errors have been caught.

Form 3.2.4-1 lists some of the principal areas of error detection that

can be performed by a computer editing program. The analyst is encouraged to check the variables in the current file against this list.

3.2.5 Manual Checks for Accuracy . Valuable as other checks on data

validity are, there is no substitute for human judgment in reviewing the

records. Final determination of the accuracy of a record demands that

the printed version of the data be manually checked against the original

document. In describing the creation of new files, Wooldridge, Corder

and Johnson state that:

"...after the data has been transferred to magnetic files the

first time, it must be printed out in full. Every item must be

checked. This is a time-consuming and tedious job; it is the

responsibility of the user department, and plans should be made

well in advance for laying on extra staff, authorizing over-time,

etc. All discrepancies between the computer files and the

manual ones must be checked out. Sometimes the error will be

in the old files, in which case it must be corrected from

45Wooldridge, Susan, et al

.

, op.ci t. , p. 58.

47
ecks

on

sistency? age ith

NO

Are

there

chi

internal

con:

(Is

reported

consistent

w

birthdate?) YES

ere

ablehecks?

I.J

rried olds NO

Are

th

reason

ness

c

(No

ma

6-yr.

etc.) YES

Is

missing

data

reported?

NO

YES

Does

it

check

for

errors

in

field

formats?

(Alpha

data

in

numeric

field,

etc.

)

o^

YES

all in file

run nst

edit

ine? NO

Has

data 1

the

been agaithis rout YES

Does

an

adequate

edit

routine

this

variable?

NO

YES

UJ Dd ZD LU

cy>—i

MALE

FEMALE

ME AME UJ CE

STATUS ON

RISTICS

NON-UNI IDENTIF

LAST NAME

FIRST

NA

MIDDLE

N

SEX

BIRTHDAT BIRTHPLA MARITAL ADDRESS

OCCUPATI EDUCATIO PHYSICAL CHARACTE

T3

Ol

+-> U

O) H-

<4-rO

(/) CD JD

fO

Z.>

0)

o

c

o

(/I c

o

o

inu

o

o

4-

I—

I

*

48
scratch... it is very dangerous to start live processing with

unchecked data, and it should never be authorized . Print-out

and checking should continue for the first few cycles of the

system; undetected program bugs and input errors are not only

likely but extremely likely ."^^

Robert Goldstein, in his Datamation article entitled "The Cost of Privacy

has suggested that, as standard procedures are adopted for reviewing the

contents of files for compliance with the Privacy Act, approximately 10%

of the records will either be dropped or rechecked in any given year.

Under such a procedure, he estimates that:

"For a typical system, about 10% of the records would expire

each year, and 90% of these would be rechecked rather than

dropped. "47 ^«

This emphasizes the importance of such manual checks. Richardson and

Cunningham have pointed out that audit trails can be kept with each data

item in the file in such a way as to enhance the review of edited data.

"Reviewing of edited data can benefit considerably from 'datamarking' , i.e., storing a bit-string with every item to

indicate whether the item:

(i) has been queried without correction;

(ii) is to be accepted regardless;

(iii) has been corrected manually;

(iv) is a candidate for automatic correction later;

(v) has already been automatically corrected. "^^

An evaluation of the current file must include an analysis of the type

of manual checking procedures employed to date. Form 3.2.5-1 gives the

reader an opportunity to score the variables in his file with respect to

these manual checking procedures.

3.3 SUMMARY OF WEIGHTING FACTORS

Form 3.3-1 can be used to determine final weighting factors for each of

the standard biographical data elements in the table. The check marks

appearing in the NO columns of each of the preceding charts should be

totalled for each variable and the results entered in this form. These

results are used to determine candidate fields where error and omissions

are likely to occur.

'Ibid. , p. 61.

Goldstein, Robert C. , "The Cost of Privacy," Datamation , October 1975,

p. 65.

Richardson, M. and A. D. Cunningham," Vetting of Industrial Survey

Questionnaires," Applied Statistics , Vol. 2, No. 1, 1972, p. 54.

49
O)o

<u o

Q. (/) ^

O) d) £Z

O ^ > •.- S

-M -rC

a» •— (/) •o U fO •<-

•r- o) s- x: Q s- +-> 4->

UJ I -o •.- O)

(_> >i CD -O O X5 > CD

S- +-> Q.-0 "O ro

dJ +-> fC Q.

-M -1- 13 -a =3 £= Olf^' Q. fO -r- -C-O

13 +-> -MSCO C O

O) O) -t- cnu

S- SC O) < =5 Cl-i-SUJ

Q.

+-> C^- O C

+-> CU -O CO E

CU

C 3

4-> -rO C n3 O

•I- CDT5

Cl 1—

a» cu c

CO ^ 1—t o

CD

t/7 UJ

>-

-o

a» E

+-> -c- c

•r- CU

S- CD

s- o o

S- 4-> O CO u

0) s- S- OJ

4-> <U M-

-M

+-> r—

CO Z3 •—

I—1 O 4-

CO

UJ

>-

UJ q; ZD UJ

O-t-H

2: Lxj O Q

UJ

_i

UJ

H- UJ (>0 DC

XUJ

C/1

Q

1—I—I

UJO<c

_J

I—

I—(

CQ

tn

ZD

I—<

I—tn

on

c/1 UJQ

<:

rz) oo

COo < I o o

<:

50
< I— q: _i 3: o

=5 e> I—

s: t-i o

ZD LU <c o 3 ucC i<i o ID o ^ LU o < e£

2:

O U.

LUO

h— z a: rD 1—I o

Q. h- hs: I—' o o Q < O LU Li.

I— LU

O ZD O I—

DO ^ q; < O LU

H-1 q;

I— Z3 o Q q:

LU LU

O

_l

O h-

_l o o O < o Q. Lice: o < LU I—

I— 00 C_) < < <: Q CQ Ll_

00O

LU <_) < LU

00

LU

00

q:oI—

LU q;UJ o- "-^

s: LU o Q

LU

_l<

LU

I— LU 00 S

00

LUQ

XLU

00

Q

f—

CQ

LUO

I—

CQ

00

ZDI—I—

00<

oo

00

LU

CHQ

a_oo

51
4.0 FILE VALIDATION

4.1 INTRODUCTION

Agencies currently maintaining personal data files will be concerned

with the development of procedures for complying with the Privacy Act

provisions regarding the relevance, timeliness, and accuracy of data in

the individual records. The file validation techniques thus established

will also have implications with respect to the evaluation of the level

of accuracy maintained in the file over time. Statistics reflecting

the number and type of problems detected when selected records are processed should give a clear picture of improvements in data handling.

For purposes of the current discussion, performance of file validation

is crucial to formulation of a reasonably accurate estimate of the re- trieval reliability for each of the variables maintained in the records.

4.2 VALIDATION TECHNIQUES

Section 3 emphasized the importance of the source document with respect

to the ultimate accuracy level of the file. The CUMULATIVE WEIGHTING

FACTOR column in Table 3.3-1, Cumulative Weight Factors for Standard

Biographical Data Elements, gives the total number of negative points

accumulated for each variable during that analysis procedure. If all

of those variables have approximately the same final scores, then the

information gained is not discriminatory, but rather implies what is

to be anticipated in the area of accuracy for the entire file. If,

however, a few of the variables have much higher scores than the others,

these should automatically be eliminated from consideration as retrieval

keys. These values are not as directly quantifiable as error and

omission rates, but should instead serve as guidelines in the retrieval

key selection process and, incidentally, as indicators regarding future

use of these variables.

Evaluation of error and omission rates must be accomplished through manual checks of the source documents against listings of the records con- tained in the computer file. The first decision to be made regarding

this procedure involves determination of the number of documents to be

checked. A reasonable starting point would be to consider using a small

test sample, say 100 records, for this procedure, and then to select a sample size according to the procedure given in Section 5.4. It appears

that a determination of error/omission rates would be satisfactory if

the standard deviation is less than or equal to .01. The procedure

described in Section 5.4 is based on this degree of accuracy.

Once the sample size has been established, the selection of the actual

records can be made. The most important factor here is that the records

must be selected from different physical locations within the data base.

This is essential to avoid skewing of the results due to system problems

such as the existence of bad tape, overwritten disk blocks, etc. Further,

since both the accuracy and the nature of the data may have varied over

52
time, randomness in selection of records is essential to a fair evaluation of the state of the data base. The number of physical locations

used in a given data base will depend upon its size, but that number

should not be less than four if a reasonable sampling is to be achieved.

For purposes of recording error and omission counts, a chart similar to

that shown in Table 4.2-1 should be created. This chart may also serve

as an audit document demonstrating the problems detected, resulting error analysis, problems remaining unresolved, action to be taken, and, finally,

indication that the file has been corrected and checked. The analysis

results for each record should be kept on a separate sheet for ease of use and also as a precaution against the introduction of confusion between records.

4.3 FILE VALIDATION EXAMPLE

An example of the techniques involved in manual evaluation of the ac- curacy of the information contained in the files is given in this section. This discussion is based on use of a small dummy data file con- sisting of one hundred records constructed through random accessing of

the telephone book and the random number generator. Separate accesses were made for each component of each name and for each number group.

Thus the entries are entirely fictitious .

The ten records (in this case ten percent of the file) selected for

validation are shown, in the most accurate source format available, in

Table 4.3-1. This data is assumed to exist on the application forms

filled out by each of the individuals. It is also assumed for purposes

of illustration that the printouts shown in Table 4.3-2 were obtained

for each of these records from the computer file.

Table 4.3-3 contains the results of the manual check performed on records

number 20 and 30. In this case, data has been stored in the file for a set of twins, HECTOR and HARRY GENERAUX. As is clear from the source documents, the twins lived at the same address at the time the applications were filled out. In the intervening period, HECTOR moved to Laurel

Street, and a system update was initiated by the operator when he re- ported his new address. The update to the record was made on the basis

of SURNAME, and BIRTHDATE, and thus it was easy for the mistake to occur.

In record number 70 an obvious case of number transposition has occurred

in the address field, in this case affecting both street and house

number. Record 80 has a mistake in the spelling of the SURNAME where

an 'I* has incorrectly been input as 'E'. And in record 100, a mistake

has occurred in entering the birthdate. These errors are summarized in

Table 4.3-4.

Use of these rates is discussed in Section 5.

53
to

to

.. 4-> O) O Q -r- +->

: uj c fo I—t i<i •!- X>

I— (_)^^

OO UJ

t—I a: >- 2:

_J O CD o

UJ

I—Q

V) Q fO UJ

1— 4-> 0)

•r— +J UJ n3 cn •r" -0

q;0 >- 2:

CQ 0

>-

CQ

UJQ

a:o

UJo <

C3

00 Q

o

Z3oQ

Q

o

Q I eC LiJ CD eX. O I—

CQ Q
o Ln un CTi

CTi C\J o C\J LO ,—

I—

CO CT) LO LO

CO 1—

1—

CTi CTi

CTi 1—t,—1 \— CO C\J 00 <—

*\ UD C\J

C£. t—t

CO ro 1—

CO OO ro 1—

C\J C\J CTi LO CTt DQ s_ 1—

1—

s_ 1 1 f—f—

1—

O) CU %^ s_ U_ XI «^ s_ CU CU J_ o E E <u CDO CU \—.

Ol >,

CU J3 E E :3 1—

r> LU 4-> >, o CU CU t_ Q \— o (~) +J > CJ 4_) <=C a> =3 CU o o CU CU U

t/) OO o Ll. s:

O

<u

c: ot

\J> <4_ CU CO "O •i~ > CD

s_ Li- CU

>RE o

CD 4J i_ 4- CU eu "O (/) CU

CU t—

i_ > fO o E E C; o s_ 1 OJ O) CU (J > CU

S- s_ > CU o CU CU CO 1— 1— OO 1

Si CQ CD

CM

C\J LU CD C\J CT> CO 1—

C\J CO o cri o I—

1—

1—1—

o o o o 00 CO o O LO CO ro en

CO ro OO CO 1—

CO Ln I—

C\J

LEQ . • . 1—

1 OO LU

LU

2:2: I—

q: (35 r~i r~i 1— o >- 1—

LU 1— 1 ry o CO LU I—o

d: CD SL cC o ca; 1

d; >- or CC 1—(

00 -I- >_ 3; 1—

LU LU ! 1 < <t o o LU

Ll. s: rc > q; LU in 11 X X Q LU LU ^ ZD —

s: -3- eX. 1 1 1 1 <: Q OC CC 1

CD ry

ear LU 1 1 1 CD' ~i~ 1 LU

q: o 2: 1—t

d; C_3 1 1 1 1 2: ZD LU LU 1—

1—

1— <c LU 00 cn CO <J3 1—

_J CD - -

LU o o Q

Q f—

o o o 00 ,—

LO /—

—

<: <—

o

cj <: O Ll_ OO O I taa

•I— 1— c

CL

O

CL-r- o

CU

+-> +-> fO CD "O CU Q.^

ZD OO

55
56
Ln

1^

CMQ

>-

CO

LU

Q. t—

E

fO 2:1—

C/O

to

s-o

M-oS-ou

O) oco

•r—

+-> ro a1

> o iZ CO 1 CO Q1—

Q

O) o

-Q C_> ra UJ

r3

"I—

— • • +J cu

O

Q •- 4J

f-H -I— -o I— <_>—

t/O UJ

t-< DC >- 2: _J O CQ O

10 I—

Q fO UJ -r- .—

I— 4J <U O -r- +J UJ C rtJ q: •!- -o

cc

o >- 2:

CO o QUJ

I—ooor

UJ o <

CJ3

i-i I—

to <:

CO

Q

to

C_) UJ o o to oQ

_i u_

-J ^—

<c ^ C_) UJ

•-< ^ rc UJ D I ca; UJ

a:CD ca; O I—

CQ

Q on

Ul UJ

X =D

BE BEQ

UJ _J CM _J X ZD UJ 0 CO 0 1—

I—

UJ UJ UJ CQ

q: ^

I— =>

00 ^

I— CO

UJ UJ

UJ cc

enQ

I—

Q

C/0 cC

(— LJ- <=C O i-H Q CO

57
<D 11I1 +-> i 4- i O

Qil—

LU

O o H-iuj ea;

r-H "is 1—1

ro CO

1— jo

Q o UJ C_3

in ; 1—1

'1

1 CO Oil >^ O: 1

Qii

Q^j

LxJj < Ll-i O'

*' q;' D llj:

(L) CD'

+-> 2:

(J ZD!

<U

4-^ i ^

OJ iji—1 eC Q ^CjOO 1— 1— 00 ct

CO t J 1 1—1 L_J \ >

CO 1 CO 1 Eo 1

roCO

S-o

S-S- LU

4-O

s-E CD OL rn E •— —I h- LU h-

:3 -r- <C ^ CO LxJ or 0 LU LU 1—1

•-H S i CO

=C LU

Q- _1 LU Ll- 1 =t UJ s: 1— H- 0 CO <c 1— LU LU 0 ear -21 00 LU LU UJ 0 1— a: q; h- ID •—1

I— <:

C3Q

Q <>0 LlQ

(/) OJ

i_

QJ

fO

\L/ ~n

fO f

' t/j

QJ

to

QJ

X S- -n

QJ

CI

Oi QJ

S- OJ S-0

+->

S- 'r— 0

M- CO 0 '4- OJ

4-J (O "O rt3 CL +-> 23 0

+-> 00

fO

QJ 0 ift3 0a QJ

cu S-QJ

CT) +-> c0 n

s_ CO

+-> CO

OJ •r—X

-M QJ

QJ 0

S-

•1—

58
5.0 COMPUTER SIMULATION OF DATA BASE RETRIEVAL

5.1 PRECISION AND RECALL

The preceding sections have introduced methodologies for determining the

reliability of currently existing data bases. It was seen that a large

part of the privacy problem reduces to the technological capabilities of

information storage and retrieval systems. This section therefore deals

with concepts related to these questions, such as effectiveness of re- trieval techniques, precision, and recall. Finally, the quantification

of these concepts provides tools for information systems managers to use

in evaluation of the effectiveness of their systems. Computer simulations are a powerful aid in performance of such evaluations. Accordingly,

a mathematical model and its associated computer simulation are presented

in this section.

As noted in Section 2.4, the effectiveness of information storage and re- trieval systems has classically been measured by two parameters: recall

and precision. Recall is defined as the percentage of relevant records

which are retrieved in response to a particular query, while precision

is the percentage of the retrieved records which are relevant. An ideal

system returns 100% of the relevant records in the data base in response

to each query, and, in that subset of the data base retrieved by the system,

100% of the records are relevant. Such high levels of recall and precision

can be simultaneously achieved under the following conditions:

1. Queries refer only to key fields where the data is perfectly

recorded (no errors or omissions).

2. All of the records in the data base are examined to determine

if they meet the query criteria.

Many storage and retrieval systems are operated as if these conditions were

true when, in fact, they are known to be false. Condition 1, perfectly

valid data, can be approached, but never really reached; condition 2,

examination of all records in the data base, can be simulated by the use of indexed file structures and multi-level searches. Indeed, when

queries consist of only terms upon which indexes have been built, condition 2 holds for real data bases.

It should be pointed out, however, that the recall and precision figures

discussed in the preceding paragraph refer only to the relationship between the query as stated to the system and the retrieved records which

resulted from the query. Normally this process is simply a surrogate

for the more complicated process of locating the record or records in a data base which match some aspect of the real world. Often the criteria

by which the user wishes to select a record are not those criteria which

were embodied in the indexing system of the data base, thus causing the

user's query to be translated into one or more system-oriented queries

before the search is carried out. Under these conditions, the most

interesting queries are likely to be those which the system cannot answer.

59
and which are thus not translatable into equivalent system oriented query

foraiulations. Consequently, the system-oriented translations of such

queries, even if answered with 100% recall and precision, do not provide

high levels of recall and precision with respect to the real query

that specified by the user.

Errors in the data base become most important when queries are made very

specific and when total recall (with respect to the real world, not just

to the query) is required. When, for example, there is a statutory re- quirement to identify the records in a data base which contains personal

data in order to provide benefits to those persons who meet the necessary

qualifications, there is at least a social cost associated with neglecting to properly identify those individuals who should be provided with

the benefits, and there is an economic cost which results from improperly

providing benefits to ineligible recipients. There is also a statutory

requirement that agencies which maintain personal data bases provide,

upon demand, the records which pertain to an individual and allow the

subject of such records to challenge errors of fact, etc. The problem

here is one of providing the inquirer with his, and only his, record,

without requiring him to provide sufficient information to create a record on him if it does not already exist.

Errors in the data base may be of two types: destructive, where the er- roneous data in a particular field errs in such a way that it will not

satisfy any real query against the data base, and transformational, where

the content of a data field is wrong, but satisfiable. An example of the

first type of error would be something like AGE=2B (alpha data in a numeric

field), which will never match a numeric query statement. An example of a transformational error is NAME=SMITH (when the name is really SMYTHE).

Destructive errors cause a record to become inaccessible via the particular

key field in which the key value has been destroyed, while transformational

errors will cause the record to be returned in response to queries for

which it is irrelevant, and to be missed when it should be found. The

effect of error rates in the various data fields employed in a query can

be quantified as follows:

1. Given a query Q consisting of the conjunction of n keys

K^, ... K^, where the K^. each represent a particular value of a particular key field in the data base

records, and

2. If each of the fields in the query Q is associated with

confidence factors (equal to 1 minus the sum of error

and omission rates) c, , c^, ... c ,

60
then the recall ratio associated with the response to query Q is the product of the confidence factors associated with each of the key fields:*

n 3. G = TT c, i=l

It follows that queries which reference more key fields in an attempt to

achieve more precision tend to be subject to smaller recall ratios since

the c^. are always less than or equal to 1.

5.2 QUERY FORMULATION FOR BEST RESULTS

Queries should be formulated using the most restrictive key fields in

order to provide the most specific answers. Additional precision can be

achieved by utilizing the conjunction of more fields in each query, although this may result in a decline in the recall ratio, thus causing

records to be missed which are actually contained in the data base. Equally, those fields with the lowest error rates (i.e., with the highest con- fidence factors) should be preferred over those known to be badly in error. Qualitatively, the following order provides the greatest discrimination

among records:

1. Name (Surname and Given Name), although the discriminatory

power of this field varies depending on the nature of the surname. Matching a name like TREFFTZS provides much more information than matching a name like SMITH, for example.

2. Surname.

3. Residence address (Street Number, Street Name, City, and

State), although this information tends to decay rapidly

with time.

*Recall ratio is defined as the proportion of relevant records retrieved

in response to a query, or equivalently , as the probability of a relevant

record being retrieved. For the purpose of this discussion (as pointed

out above), a relevant record is one corresponding to an individual who

has exactly those attributes defined by the query. However, the actual

recorded key values may either be in error or omitted. Thus, the probability of the key value in the ith key field being correct, and hence

retrievable by the query, is c-j . If the retrieval mechanism is such

that a record is retrieved only if it matches on each of n key values

in a query, then it follows that the probability of a relevant record

being retrieved is the product of all the n probabilities; i.e..

and so this is the recall ratio.

61
4. Date of Birth (Year, Month, and Day).

5. Place of Birth (City, State), although this also varies:

Sparta, Illinois as a birthplace provides more identifying information than does New York, New York.

6. Sex. This is an example of a key field which provides

very little information it may partition the file into

two equal halves at best. In more extreme cases where

the contents of the file are heavily skewed (all males

or all females) this field provides, in general, even

less information, only being useful in the rarer cases.

Subjective estimates on the discrimination of various keys are provided

in Table 5.3-1 while statistical data on surname records are given in

Table 5.3-2.

5.3 SOFT MATCH TECHNIQUES

"Soft-Match" techniques may be utilized to overcome the decline in recall

which is normally associated with improvements in precision. The increased error rate which is associated with increases in the number of variables

entering into the query can be reduced by examining the records retrieved

by the sub-queries. For example, a query containing three key fields would

ideally return a record (or set of records) in which the three required

values are found. Errors in the recordirjig of either the original data

or the query may, however, have produced only a partial match, i.e., for

either one or two keys. The problem is to devise a method for accounting

for these partial matches. Such methods are called "Soft-Match" techniques.

The result of a Soft-Match Technique is not only a set of retrieval records,

but also a numerical weight assigned to each record to indicate its degree

of responsiveness to the query. In Appendix III a specific weighting

scheme for a Soft-Match Technique is presented.

5.4 EXAMPLE OF USE OF FILE VALIDATION SUMMARY DATA

In Section 4.3, an example of the use of file validation techniques is

given. Tables 4.3-4 detailed the summary of error and omissions within

the sample data file. The final tally of errors shown in the table for

each of the variables is:

Variable Error Count Per 10

SURNAME 1 FIRST NAME 0

STREET NUMBER 3

STREET NAME 3

DATE OF BIRTH 1 62
Table 5.3-1 Retrieval Ratios (Estimates of Proportion of File Retrieved)*

Field Number Contents Retrieval Ratio

1 Day and Month of Birth 1/365

2 Month of Birth 1/12

3 Year of Birth 1/50

4 State 1/50

5 Sex 1/2

6 Street Number 1/10,000

7 Street Name 1/5,000

8 Education 1/15

9 County 1/3,000

10 Date of Birth (YMD) 1/18,000

*The values used are based on subjective estimates taking into consideration the meaning of the keys. These values are used in the model described in Section 5.5.

63
Table 5.3-2 Statistical Classification of Surname Records as compiled

from Social Security Administration Accounts.

DECILE* Number of Records Retrieved'-^* % of File Retrieved**

n1 io. Jo . ooouoyo/A

o /I no 1

"7 4Uo. 1/ .0002459/6

3 1,599.28 .0009635%

4 4,515.456 .00272037%

5 8,000.00 .00481966%

6 10,999.94 .006627%

7 20,997.32 .01265%

8 80,000.62 .048197%

9 130,000.80 .07832%

10 561,773.3 . 3384%

*Decile 1 corresponds to the least common names. Decile 10, the

most common (e.g., Smith).

*Based on 1 value per surname key. Each decile contains 10%

of the population.

"Report of Distributions of Surnames in the Social Account Number

File," Department of Health, Education and Welfare, June 1, 1964.

64
These error rates imply that the file as a whole is heavily riddled with

serious errors: the single error in the surname sample implies that 10

of the records in the file are coded with an erroneous SURNAME -- this

is 10% of the file. Three detected errors in the STREET NUMBER again

imply that 30% of the street numbers in the file as a whole are in error,

etc. Based on this information, a typical query against this file, using

the keys of SURNAME, GIVEN NAME, STREET NUMBER, STREET NAME, and DATE OF

BIRTH, would have a combined confidence/recall factors of only 39.69% -- less than half of the truly relevant records would ever be located in

response to a query.

Normally, of course, statistical methods would not be used on a file as

small as the dummy data base discussed here, but would be used for a file

containing thousands of records. The procedure is as follows:

Suppose we want to determine the error rate (or the omission rate -- the

theory is the same) so that the true value differs from the measured

value by less than 0.01 with a high probability (say 66%). This means

we want to choose a sample size so that the standard deviation in the

determination of the error rate is less than 0.01. The standard deviation

is given by the formula: 50

error rate error rate x (1 - error rate)

Sample Size

Therefore, if we wish the standard deviation to be less than 0.01, we must have

Sample size > 10,000 x error rate x (1 - error rate).

Since the product of the error rate and its complement is bounded by 0.25,

a sample size of 2,500 will assure a standard deviation of less than

0.01. But a smaller sample size may be used, depending on the magnitude

of the error rate. To determine this, select a small test sample, say

of 100 records. Estimate the error rate for this test sample. Then a safe determination of an adequate sample size is given by

Sample size = 10,000 x estimate of error rate.

For example, if the estimate is 0.1, then the sample size should be 1000.

Having determined the error and omission rates, the confidence factors

(see Section 5.1) can be calculated. The recall ratio for any query involving the key fields for which these confidence factors have been

developed is simply the product of the confidence factors.

Hoel, P. G. , Introduction to Mathematical Statistics , John Wiley and

Sons, New York, 1954, pp. 87-88, also pp. 107-108. This is the usual

formula for the standard deviation of a mean value.

65
Assuming that the error and omission rates for the variables SURNAME,

STREET NUMBER, STREET NAME, and DATE OF BIRTH were 0.01, 0.03 , 0.03 , 0.01,

respectively, then the resulting confidence factors would be:

SURNAME 0.99

STREET NUMBER 0,97

STREET NAME 0.97

DATE OF BIRTH 0.99

and a query involving all four of these fields would tend to retrieve

0.99 X 0.97 X 0.97 x 0.99 = 0.922 or 92.2% of the relevant records.

Use of these data will be shown below.

5.5 PRECISION AND PROBABLE MATCH

Given a certain retrieved record, the question arises: Is it in fact

the correct record for the requester? The answer to this must be ex- pressed as a probability. The theoretical formulation of this probability problem is presented in Appendix II.

A computer program was written to calculate probability values resulting

from the use of various combinations of keys. Recall that the basic problem is to evaluate the probability that a record will match a requester

given the presence in the record of a number of key values K, , K which match the request. The probability values are developed in terfns

of the following auxiliary quantities.

(1) p = the a priori probability that a randomly selected record

corresponds to that record desired by a requester.

(Notation in Appendix II, Equation ( 16), p = P(M^. ))

The range of p should be from 1/T (where T is the largest population from

which the data base is selected) to 1/N (where N is the number of records

in the data base).

For each key j on which the search is conducted, let

(2) a. = error rate in key j (a proportion).

(3) b. = relative frequency of omission of data in key j.

From (2) and (3), we calculate

(4) cj = 1 - aj - bj.

Thus c. is the probability

66
P(Kj|M.)

given in Appendix II, Equation (8b),

(5) Let n. be the number of records with specific matching data in

key j, i.e., the number of records retrieved matching the re- quested value of key j. Let N be the number of records in the

data base, then define

r. - n./li

Thus r. is the probability P(K.) given in Appendix II, p. 176.

(6) For each key value j we define

(7) We then have from Appendix II, Equation (18), the probability

P(M. |K^.) given by

(8) An auxiliary quantity F (Appendix II, Equation (23)) is then

calculated:

where n is the number of key values which match the request. The quantity F is used as shown below.

(9) Finally, the required probability (i.e., the probability that

a record is that desired by a requester conditional on a match

on n key values in the query) is given by

V

=

1 + EF

where E is a quantization of a certain independence relation between the

keys, (see Appendix II, pp. 179-180). The smaller the value of E, the

greater the ability of the keys to discriminate. Independent keys mean

that E = L If E < 1, then V > 1/(1 + F).

The probability value V corresponds to the precision of a retrieval of one record.

Results of the computer simulation are shown in Appendix I. The tables

should be read as follows:

67
(1) Each table is identified by the data fields used in the

simulated query. All simulated queries utilized the sur- name field.

(2) The surname decile identifies the discriminatory power of

the particular surname used in the query: Surnames in

the first decile are the most specific (TREFFTZS, for

example) while those in the tenth decile are the more

common surnames j such as JONES and SMITH.

(3) The column headings reflect the three sample file sizes

which were simulated: 1 million, 4 million, and 220

million records.

(4) The left column of the table reflects the recall factor*

obtained by multiplying together the simulated error rate

for each of the fields utilized in the query. These rates were varied in parallel from 0 (no errors) to 6% errors

in increments of 0.5%. All fields were assumed to be

subject to the same error.

(5) The body of each table tabulates the precision of each

retrieved result with respect to the query. Values of

1.0 imply that unique records were properly identified.

Values less than 1.0 imply that the probability of

unique identification is less than 100%.

The model reflects the precision and recall resulting from the attempt

to locate the record pertaining to a specific individual in a data base

of the specified size, subject to given error rates, for several types

of hypothetical queries. Three file sizes are postulated: a file of

220 million records, one of 4 million records, and a smaller file con- taining only 1 million records. All the queries are assumed to consist

of a surname and one or more other key values. The discriminatory power

of a query varies with the discriminatory power of the key and key values

used and the confidence factor in the data base. The precision of a retrieval made against the three file sizes given the retrieval confidence factor of 92.2% in the example of Section 5.4, and utilizing the

four key fields of surname, street number, street name, and date of birth

can be read from the fifth line (recal 1 0.922) of Tables 5a - 5j in

Appendix L The tables present 10 different values for the retrieval

precision of such a query, depending on the value of the surname: names

such as Jones have far less discriminatory power than names such as Trefftzs or Krcmar. It can be seen that the precision of a query improves as the file size decreases. Files smaller than 1 million records

will provide proportionately better results.

The definition of recall is given in Section 5.2.

68
6.0 CONCLUSIONS AND RECOMMENDATIONS

6.1 CONCLUSIONS

The preceding sections have addressed the problem of accessing individual

records from personal data files using non-unique identifiers where

accessing includes updating, purging, and other bookkeeping tasks. The

value of the legislation requiring Federal agencies to make sych records

available on request to individuals whose dossiers exist in their files

is obvious, but compliance with this legislation is a complex matter for

which there can be no single generalized approach. Each agency must

determine independently the most appropriate solution given its own operational environment.

Exphasis in this document has been on one aspect of the required implementation: the retrieval of the individual's record through use of

identifiers that he can readily recall and that do not include his Social

Security account number. The analysis has included examination of the

characteristics of standard identifiers with emphasis on the varying

selectivity of these variables. The high discriminatory value of the

NAME variable resulted in inclusion of descriptions and evaluations of

several of the currently available name lookup algorithms. Techniques

applicable to this type of retrieval problem were discussed along with

indexing schemes ranging from the most straightforward to complex systems

of encoded pointers.

The selected examples for generating the precision tables from the mathematical model (see App. I) clearly show that retrieval through use of

non-unique identifiers is, indeed, possible. It must be understood,

however, that the search keys used in these examples are illustrative

only. In practical cases it may be necessary to employ search keys with more discriminating power. Furthermore, such retrieval has been carried

out in a variety of ways and has proved to be practical. For example,

the 3-level index scheme developed by the Immigration and Naturalization

Service presently retrieves 5,000,000 records (anticipated growth up to

10,000,000 records) with a response time per record measured in seconds.

The discussion of available techniques also made it clear that the degree

of success resulting from use of such techniques depends directly on the

quality of the dato items being used as search keys. (The assumption

is made that the query data itself if correct and that it has been

entered properly.) The reliability of retrieval through use of non-unique

identifiers was further demonstrated through use of a probability model

programmed to generate the precision (i.e., the probability that a record

if retrieved as matching the query, as formulated, .on a variety of keys,

will be in fact the correct record), given a wide range of recall factors

(i.e., the probability that the record, if in the file, will be retrieved

based on a range of confidence factors simulating a reasonable level of error and omission rates). Results from this modeling procedure again

indicate that retrieval mechanisms based on high discrimination keys are practical

.

69
It is also clear, however, that these techniques must be implemented with

great care. The use of non-unique identifiers results in very high precision but rather low recall. This effect is obvious from consideration of the fact that the more identifiers used, the more complete the

identification of the individual becomes. At the same time, the introduction of more keys increases the potential for problems in matching

exactly the information that is contained in the file. For this reason,

a Soft-Match Technique, such as that described in Section 5, may be

necessary as back up to the retrieval procedure.

6.2 RECOMMENDATIONS

The Office of Management and Budget has interpreted the language of the

Privacy Act to mean that the mere existence of personal data items in a file is not sufficient to bring it under these legislative constraints.

In accordance with the definition of "system of records" (Privacy Act,

Sec. 552a (a) (5)) these items become relevant only when they are used

as retrieval keys:

"This language further suggests that the Congress did not

intend to require that an individual be given access to

information which the agency does not retrieve by reference

to his or her name or some other identifying particular."

A first step in compliance will then be to determine the exact keys cur- rently in use and from that list to determine whether or not the legislation applies.

The current considerations apply only to the specific problem of the

retrieval of an individual's record. But even this single aspect of

the legislation will require a review of existing systems to make the

following determinations:

1. Are the personal identifiers contained in the file necessary?

2. What non-unique identifiers are currently available as retrieval keys?

3. Are these currently available retrieval keys adequate for

accessing the required records in a cost effective way?

4. If not, how can the existing capabilities be expanded or modified to make the required records accessible?

Each of these considerations is discussed below.

51 Office of Management and Budget Circular A-108 and accompanying

"Guidelines for Implementing Section 3 of the Privacy Act of 1974,"

Federal Register , 9 July 1975, Vol. 40, No. 32, pp. 28948-28978.

70
6.2.1 Evaluation of Current File Access Capability . If it does apply,

the agency should make a determination of acceptability of the current

retrieval capability in the context of the legislation and the 0MB Guidelines. Using the search keys that are both available and relevant,

weighting factors should be formed as outlined in Section 3. This procedure should be followed by an analysis of the error and omission rates

for these variables as suggested in Section 4. From these rates, confidence factors can be formed, using the methodology described in Section 5,

and a determination of precision and recall made for some combinations

of these variables using the computer-generated tables shown in Appendix

I. If the variables that are already available as retrieval keys are not adequate to the task, then current system capabilities will require

expansion. Some discussion of available techniques is given in Section

2 for consideration under these circumstances. It should be noted, however, that the Office of Management and Budget has stressed use of existing capabilities whenever possible.

"...the development of new retrieval and indexing capabilities is not encouraged, rather agencies should ex- ploit existing capabilities to serve individual needs. "52

6.2.2 Evaluation of the Data Base . The most difficult aspect of the

analysis procedure is that involving evaluation of the data base itself.

An orderly sequence of steps should be taken to evaluate any data base

in order to bring it into compliance with the requirements of the Privacy

Act. A similar sequence should be followed when establishing any new

data bases containing personal data. For existing data bases, the re- quired actions fall into the categories of:

1. Analysis of present data validity,

2. Correction of errors,

3. Retirement of obsolete data, and

4. Establishment of a review cycle to keep data current.

For new data bases, the first of these steps is replaced by an analysis

of data requirements and initial data collection steps.

While it is unrealistic to assume that any data base is error-free in

any data field, all fields which comprise the data base should

contain data which are as accurate as possible. Error rates which ex- ceed four or five percent tend to throw the utility of the data base into

question, and fields with such error rates should be either corrected

(at some cost) or deleted from the file. The basic test of any personal

data base is whether the people represented by the records in the data

base can, in fact, be found and shown to be the individuals to whom the

records are assumed to refer. As time passes, addresses change, names change, ages change, occupations change, and people move.

Loc.Cit.

71
Files which have not been subjected to ongoing verification and update

activities, particularly those in which the subjects are not actively

involved in the maintenance process, may be found to contain a large

cast of fictional characters.

The requirement for the maintenance of such files should be reviewed

at the highest levels--certainly such information should not be made

the basis of substantive policy decisions, and the very need for the

file in question should be carefully considered. Files which are really

necessary, however, should be evaluated periodically to determine their

accuracy and to correct erroneous data.

The utility of such files--and compliance with privacy legislation--

requires that a high level of accuracy be maintained, and that suitable

resources be expended to insure such a level of accuracy.

72
APPENDIX I

PRECISION TABLES

Table IDs Variables Selected Pages

la - Ij Surname and Sex^ 74 - 83

2a - 2j Surname and Street Number 84 - 93

3a - 3j Surname and Birthdate (month/day) 94-103

4a - 4j Surname and Birthdate (year/month/day) 104 - 113

5a - 5j Surname , Birthdate (year/month/day). Street Name

and Street Number 114-123

6a - 6j Surname and State 124-133

7a - 7j Surname , Sex , and Birthdate (month/day) 134-143

8a - 8j Surname , Sex , and Birthdate (year/month/day) 144 - 153

9a - 9j ^ Surname , Street Name, Street Number , and State . . . . 154 - 163

10a - lOj Surname , Sex , Street Name, Street Number , and

Birthdate"Tyear/month/day) 164-173

73
^ i

>S) 13 iS 13 13 iS iS IS iS iS 13 12 13

't 1

1 2: 1 UJ LU IJJ LU IJJ IJJ i.U LU lU LU lU LU UJ

I O i i3 iS i3 13 i3 IS iS 13 iTl •3 13 |3

•a: 1 3 13 3 IS IS! iS iS iS i3 iS i3 IS

T. 1 1 _i 1 IS 13 12

;§

13 i3 IS IS iS IT; 13 13 13

Ql 1 i _j 1 13 iS 13 IS 13 iS l_^l 13 iS 13 i3 13

1 1 IS IS i3 13 iS 13 13 13 i3 IT! iS i3 iS

0"! 1 1 s: 1 13 13 iS IS 13 13 13 13 13 IS iS IS 13 i3 :s IS iS iS 13 i3 13 iS IS IS IS C 13 i3 iS 13 iS 13 13 13 i3 i3 iS iS

I IS IS i3 dj IS

1 131 iS iS

1 IS1 iS iS i— i2 O 1 UJ

i LUi IJJ

i LU ^

Ixl LU UJ

i LU1 UJ

i UJ

iT; I'O CO r-- CO i.n IV. .n UO iTi i

CJ

_J 1 Q-i •3 IJ"; Ln LO IX' r-j ^ ro in ]J' ._j i i'O Ul ij"; LO LP ir; ij-i ID 1.0 r- c i"U UT! IS 1? j r-- iX' iS l"-- r1— Ijj CO

'r. \ tSl rc; iji CO r- I"-- IX! r-. |C CO 1 . i 13 f-j -t LJl i - iji ro I-- iO

G"i 1 CO IJJ LO LO OJ IS iJl IT',- CG CO CC or- 03 CO co u:i CO CO CO r-- r- rr.j 1 IS . :S is 3 iS iS iS i5 IS iS 12 iS iS

13 13 IS iSi IS 13 12 iS 12 !3 'S IS i2

:r. i 13 1 LU .UJ LU LU LU UJ UJ IXi lU Ix! UJ LU lU 13 12 IS iS iS IS iS IS IS 13 IS IS |2

-J 1 IS IS i3 iS iS IS r.-

= i".'i iS e.i i2 IS 12 _i ! IS rr- 13 |3 IS IS iS IS IS i v 1 13 iTi 12 IS iS IS 13 iS IS iS iTi IS IS 13 r 1 IS ;i 13 IS IS iS !.;j^i IS 12 IS 13 1_J i

13 IS IS IS i2 'S i3 IS 12 12 iS i3 iS 13 13 IS 13 i3 2 12 12 i2 12 13 12 IS

13 IS 12 IS iS i3 13 13 IS IS iS IS IS

LU

r

(

1 13 IS |^J IJJ iTi IX! IS LH El i-U •I 1 12 IS 13 IS 2 iS i?-i CJ ro I'O

Li_ 1 IS Oj iXi LTi ro i"j IS iTi 00

_J

1 IS iJl iTl ij'i iT-i iri iTl iTi iTl CO 00

iS^ IS IS IS IS 13 12 i3 13 13 i3 S

UJ

.:t;

1 >i ?! li JS y: K it J:. K

li:'. 1 IS IS 15 13 13 i2 2 13 12 '2 13

1 IE iS LiO iS LT '3 u:i IS LlO iS LJ" 12

1 i3 iS C-i C-.J ro ro LT U" <£.

lU

74
LU 1 i3D El GJ '3 '3Zi O 1 13 13 13 iX'-i C)

UJ IJ-J 1.JJ IJJ IJJ Uj Ixl ijj I.1J UJ Ijj UJ UJ UJ

1 l_l 1 f'- 'Zil' ^1 ro u:- OJ ID iTi Oj

ill iS n ID 'jZ' iji r-'i r~t |-'-^ C'J

1 _J i OJ I'D U"i I? r-- u'> r-- I'l •<;l- iTi lT-| D:; 1 .J 1 iS rj r-1 O-i IjT 0:1 iji Oj ID iXi h- LU 1 ^1 ) iji 'Xi m Ol Xi iM IJJ vr I'O Uj i"j h- LU r 1 W' 1 1 'Zi 1 03 <rt- CO •T 13:1 -~r O'J vT r- q; (X 1 f-- r-- r~- 'Xi 'Xi iXi ID ij"i ID \r sT 'J IM ^ 1 LD LTi iXi in ID to u:i ID ID ID LO ID U- QC 1 o '.III 1 IS i2J i3j i3 CZi 13 Gj iS

I/-J

UJ

|-,J 1"

I C'-.|

1"'

n

1 1''.-'

_i_ 1 [ 1 1 1 ~\

I 1 1 1 1 J ijj 1 ij ijj LlI UJ ijj 1 i' UJ i.i-i Ij..' LL' 1 V

H^l 1 f'

' iZ 03 '."'-,1 f-rj l.jj

,

r--

ri-

'Jll lT-|

(7 'I I'-J n

a\ r-...

pr,

Ti'i

I r") d 1 i.Ti IDi "J" 'P i^Z m ro rri 'JJ

'•j3 |\ '.L' 'X' CO f'- 'X' 'J;

i-Xl \n ID "'•T 1-^' r--

T'-J i ro fO ro r-n lOi r-; in iij

Q i.l'i IXI 'Xi i-':J 13' 13 13 i'Xi i3' 13

i3J iri L-_l iSj Cri 131 13 Cv i3i

l_J i UJ LLl UJ Ixl Ixl UJ UJ UJ U! LlJ UJ Ixl UJ

Li* r-- i"j 1X1 '3' r-

--J 1 ro iji 1^ I-.. ro' r''-j IXI ijj <T' -J 1 liJ ro T Ijl r-- 00 ro ro CO

r-- Oj 6"! 1

- ,1 uo co uo IT) ro 1^- O-J UJ LP iJi ro rn iaJ IXI r>.

,

ID iji r-'-i CO 0-J r--

r^J PI rn •X! IDi ro i3t Oj r- ID

Oj 01' 03 r-- I-- r-- r-- '-£< 'Xi IX' 0"'

LE

El 13 '3 i3i i3

O

a:UJ

0 13 iM 'D •Ti C'J KD liJ UO 13 'X'

iri r-1 13 13 13 13 '3 i?-J CI r^"i '0

i3 iri OH <-D ID ro C! i3j iTl Oj

IS IPI 'iTi iTl iTl iJ"! iri iji G'l G"i 00 00

'3 iS iti iS 13 i3i 13 13 13 13 13 i3

5^ K

13 13 13 13 13 13 13 13 13 13 ITI 13

13 LP 13 LT/ I'Xi LTi 13 13 ID ITl 131

13 13 CI 0-J roi r»:i LTi Ln

75
•I 1i ro r<",

m f'V ro r-- in lO

ijj 1 Tl.ij1 7

ij^'1 3! T

CD ! i UJ i ijj LU IJJ LU U_! UJ L'J UJ i UJ 1 UJ ) LU

U"i -J3 Ui rm f - i <-,- 3

-J ; iTi ro r- 3 OJ L"! iT, f i i 7 M ro LH in iTi OJ rCD CO C-i in CO IJ: i.r,- iJi Iz: ! ijD i.n ro 13 r- r'l CS C'-j ro

ro Ul ul '.£i r- Oj 3 1-0

O i ^? CJ 13 IJl co r-- ij:. 'ij ij-j -> ro

Cm 1 Ut IJ'! U-i CO CO co 'Jj CD OJ CO

i3 iS 3 3 3 3 3 3! 3 3 3 3 3 3 3! 3 3 31 3 3 3 3 3 3

z: 1 i 1 ! 1 ! 1 1 1 i 1 1 1 ! LU LU UJ UJ W Ul UJ UJ U LU LU UJ 1,1.! r- U'.i ro ro un IT| r-- CO CO 3

_i i 03 iJJ 3 UJ OJ 3 i-D 3 ? r-

_i i 3 m U'.i r- eg 3 3 3-

I.JD OJ co U" Oj ro 3 i OJ iTi Ul r- lT| O.j uo Oj un ITi

LTi 3 ijj Uj Oi OJ CO ro 3 3 or. i

r--- uo

01 Ul -r- ^ XT

p3 31 3 13 3 3 3 3 3 3 3 3 O

r_ji .rr LlO

LU 3 3 3 iS iSi 13 1^1 i3 3 3 3 3 3 3 3 3 IS 3 3 3 3 3 IS 3 3 3 Z 1 LU UJ LU liJ LU UJ LU LU LU LU LU LU UJ O i ro in 3 ID Ci LO ro LTi r- 3 CO on

LO ro a- CO iM OJ r-- 3 iJl _1 1 Gj 1 UJ OJ r-'j ij-i iJl OJ OJ G-i OJ

_i 1 in 0-J OJ CJ OJ OJ 10 LOi i£i Oj

01 i.n 31 i:o i"J i-O 3 'T iTi T. 1 CO i-D llj on i.D LO r^o OJ 3 Oil CO OJ Oj iDJ r--- IV i'- r>- r- f'- i.£i 3 3 3 IS IS 3 3 3 3 3 3 iS 3

i3 IS 0-i

T i-D Ui OJ i£i 13 LO 3 t£i 3 3 iS 3 3 3 C-l i"J ro ro 3 iT> on IV i£i Ul in Oi 3 iTi CO 3 iTi iTi >T^ CT, Ul Ul Ui Ul Ul Ul on on 3 3 3 3 3 3 3 3 3 3 3j iS

LUaa

Lt:

5? 1^5:: 5£ ?•£ 3-£ J? 3 3 3 31 3 I'^i 3 iVl i3 3 Cj 3 3 I.n 3 U ' 3 LO 3 LO 3 Lfi iS in Ui 3 3 OJ OJ I'O roi in in i.£.

76
1

Ci Ei i3 Ei El El El El El El El

:r i i i I 1 1 1 1 1 i 1 i ! ! 1 ) i iJJ LLl UJ UJ LU UJ LL! LU U-i UJ iJJ UJ CO i r- lO r^i iO i.n f' CM '-£.' r^j ro r>- o • ._i r-- Oj 'S CO E: N- El \\- El OJ 1 i iM CTi ro IV iTi r\- U"! E ill r- iTi In ! ro rv. iTi LO fvj E; CO f-- r-. t—1 j 1 LlI £ ! r-i"! LT.i IS i/j XT Ei ro OJ

li_ 1 IS Qj ir Ul 1J-! CO OJ 1 03 r-- Fn- r- i.£i 'D u:i '£' I.n CC 1 i O'l t— 1 <X 1 1 ijj Q Ci Ei d El El El El iT' a i 1 _i ]1 ro ro roi ro roi roi ro roi r<':i ro ro roi E El El E r'l El El Ei El E E' E' El z: ! 1 1 i 1 1 1 ! i 1 1 I 1 i_'i i U.1 UJ UJ UJ UJ LO LU %

UJ U' ^' r- r-.. 1-0 l£! I.n o; a?

._j 1 0-1 O-i UJ Oj OJ ro i

1/ I'O iX' ; i roi W! r>- Ij-: 0 1 iji u"i 10 Oj Ij-i

O'-.i IT, r- r-... iT-i O-I CO ro r'.i Vl IJ. ro T. 1 r--. CO I.O ro CO r- i: ') roi O-J El •5 El r- Oj in E i ro ro O,! OJ OJ Ei ;' "I ij-; IJ-! Oj ! ro r<i ro ro lO ro r<".i ro ro O-J OJ

i>J 1 E E El El El El El El E E iS El Ei

LLl

Dill;'

ill 1 Q 1 El1 E1 El Ei El1 El1 E'1 El! El! E El El 'p y i i ~ i iJj Ix! 1 UJ UJ LU LU UJ UJ 1 UJ 1 UJ ! 1 LU 1 El 1 OJ in OJ Oj UO IJI 1

El iTi ro r\- I 1 !.r.i roi (TO Oj UIi r- UJ CO r-- T. 1 1 -J i r-- n OJ CO r--

il: i 1 _1 ! O-J OJ Wi E r^ 03 LO iji uo ZD 1 1 i 03 ro r-- r-j r-- OJ CO 1

CO 1 1 H 1 IT-I OJ U'l iJi Wl iji OJ ^u 1J1 fO I.O El

El E! cri Oj 'Xi !.£, lO ro roi

r-- !\- i.£i i£i i.i'i i.£i i.£i 'Xi i.£i i.£i '.X I.O '.£i E Ei E El El E El El IS El El El E E OJ CO OJ >D El LO El D

El El El Ei El OJ OJ roi FO

iTi CO r>- i.£i UO ro. OJ El iji Oj

iTi iJi iT, iTi iTl iji iTi Ei iJi ij1 CO CO

El El El . El E E CD El El E E El 1 a J4 ?4 >t 1 El El El El E ID E. El E 13 E (D 1 ID ID E UO ID in G in ID E L-O ID

El 1 El OJ OJ ro rom U: l£i

77
l?-J l?J lAj OJ 'M IM C-i C-J C-J

iTi IS IS IS IS i3 iS IS IS iS IS IS 1 1 i I ! 1 1 1 ! 1 1 1 1 O 1 LU UJ LU LU lU VJ lU UJ IJJ ^ 1 ro OJ IS iXi u~ 0-J r-j IJ"I r-- JO

...J 1 m r-- in IS CM IS 10 Ijl IS _1 ! ._! 1 CO i-jii iTi !'! '1- LO iJl LO

LLl i i.j;i L" iTi r.- Ijl CJ IS rci '

' 1 1 LU r 1 OJ T Lfi r-- r-.. Ll_ 1 1 r-j ro l>J IS CJ C-i CJ

XT 1 IS IS iS IS iTi 03 r- LTi

V rci l?J a: 1 1 O'l lj-l iTi iTi IJl IT, iTi iTi Ijl Ij'l i-- 1 CC 1 1 LJJ IS IS iS IS IS iS IS iS iSi s IS IS IS

IT) 11 ro PO ro I'O ro ro ro JO I'Oi 10 I'O! ro i~o 1 IS iS IS IS IS IS IS IS iS IS iS iS iSi 1 z: ! i i 1 1 1 1 ! J i 1 1 1 O ! UJ lU LU UJ ijj UJ IJJ lU jjj IJJ lU UJ UJ 1 IXi IJJ 'JJ LjO iS CO IJO -rt lj~ ro

_J i LTi \7> CO i-£i CO LO JjO iT'i ?^ IS CJ OO i ._! i ro CJ ITi CO LO CJ CO OJ lo I-- iS i> .1 1 ITI C-J Jj" UJ J'O G"i ro rv LO 1 r 1 '.JZi J-- iJi CJ iXi 00 iS CJ 1- 'Xi 1 CO i.£i CJ iTl r- in ro CJ IS o:; iJJ 1 iS 1 oil 03 CO O'J OD r- r- r-- r-- I'- IX' UJ ! OJ 1 CJ 1 IS IS IS IS IS iS iSi iS iS - IS iS iS IS i

LU

LU S 1 IS iS IS i3j IS iS IS IS iS1 1 iSi iS1 ^ i 1 :z: 1 1 UJ I 1 LU lU 1 UJ 1 UJ i LU 1 UJ 1 UJ UJ UJ UJ UJ 1 UJ 1 LTi r-0 IXi 0"i I.O ro 0-1 •X i UO rs- IXi IPJ IS LO CJ

z: 1 1 ._) 1 CJ iji

m ro CO r-- SI iS IJJ q; I 1 ._! 1 r<i iT\ on Oj d i' iTi ijn LO ir- on CJ r-- S i LJl iXi iT. IS lOi m 1'- iji CJ <f

iXi 1 1 T. < 'B OJ Q-J I- GD r^- fi iTl un

!i

IS

IS iji IJ^ iTi 00 on ^- r-'- ijn iXi

•\r Id ro roi roi ro ro ro ro lOi ro Id

IS iS IS IS IS s IS iSi IS IS iS IS IS

IS IS

u i.n 1^1 Co iXi in iS 'Xi IS IS IS IS IS iS CJ I'l"! ro

IS III on ^- 'O IXi i' ro CJ iS iJl on

cl

U ) iji iTi IJI iTi iji iPi Ul a: iT, on CO

IS IS IS 13 iS IS iS IS iS i3n iS ! K K 5^ 3i- 5-?. K a it }-S 1 IS IS CTi IS IS IS IS IS IS 1 IS in IS ITi 'i; m IS in IS LfJ 133 U3 IS

a 1 iS iS OJ OJ ro rom iJ'l IXi

78
i1111 i11ij 1111] C'S (-< ITi ro ;-0 ro r-o ro i-o ro ro 1 1 1 IS1

r.j1 IS iS iS iS iS1 IS ISi IS Cj 1 i O i IXj U.i 1 ijj ! li! ! Ll.1 ! iJ.! 1 Ijj UJ UJ 1 pj UJ 1 UJ 1 ro Ui rri V-1 Ul ij:i CO C'l IJ-) CO _ : 1 lAJ iS i,n IS r-o si' 0"! \n iTi iM

._! i 0-1 i.n C'\ CO r--. ]- r- .

(- rI-- rri CO lO n-. ijj ro f"i >Zi z: I 03 1

IS r-- ro IS rv. r-- C-i r- m ro IS ITI r- i-X) roi OJ

IS i

r--.' 1

r- !

Ki i-'-j rv ro I'O l?J OJ Ci OJ OJ OJ OJ ij 1j ~ i

iS iS IS IS IS 'S IS IS IS iS IS iS I'O 111i1 I11I1 11I11i rg I'-:, f-.j OS OJ cv I?-.! i"j OJ OJ OJ OJ OJ Ii 1

i'S3 C'i IS IS IS IS IS IS CD IS ISi IS1 IS1 ' 1 1

Z^Z ! C.i ! 1 !ii 1 UJ ! tjj 1 UJ 1 ijj ; U.! ijj 1 1^ 1 UJ UJ UJ UJ 0 i i ! : I CO iXi ro IJJ ro U~i r-- IS LO r'-.i in IS OJ i ! _! 1 o; on Ti- s IS LO i\ 

r-- ijo IS IS

-.J i -J 1 rn r- tr> iTi i7i ij? Oj -r r-- r-- ro

ij'i IJ! r>- U'! ro C'J <?! ijri roi ^f 1 UJ i.£i f'- ro IS r- '4

C'l IS Oli r- |j:i

m

Ll I i rj '.D C-i •^T IS ro ij:i CU \i- I?

ro O-.J OJ iS IS CO r- r-- in o: 1 1 iXi r-- r-_ r--

]"••- r- Ijl! CO I.O li 1— i •-x 1 1 ijj i3 IS s IS IS IS iS iS IS iS iS iS IS « ! 1 _!

'OO 1 LJ 1i IS IS IS IS IS ?

IS iS si s s S'1 IS1 1 z: i 1 U,! i UJ 1 UJ 1 u^ 1 UJ i UJ 1 IJ-i UJ 1 UJ i UJ L'J UJ i i_i i I.JJ ro IJI r- IJI Cj U~i ro o.i 'J S ! IX> •=? ro •# i.£i CO r-.- 'D CO ro i -J ! IS CO OJ r- ? w ^ r-- OJ ro Ui

lii i ! _J 1 iS OJ ^ iS iS OJ r-- UJ IS ro r- S 1 ro LO to r- OJ IS IS ro CO ! 1 r 1 r--- IS ij"i OJ IS r- CO IS ro

iTl i7i iS IS CO on 00 r-- r'- 1''- Ijj l.O I.O OJ OJ OJ OJ OJ OJ OJ OJ OJ OJ 0-i OJ OJ IS iS IS IS IS iS IS iS iS S' IS IS iS i 1 1 IS IS OJ 'Xi iTi OJ I.JJ Oj IS IS w

(X i IS IS o IS iS iTl Oj OJ roi ro U- 1 IS CO r^- IS IS ro OJ IS iS CO 1 IS IS IS iS Ijl IJi iJi IS 0''; IS CO OJ

_1

iS IS IS IS IS IS IS iS IS IS iS

':j. ! K ?-i S-i 5i 5?

K 3-;; Ji i iS IS IS IS IS iS iS IS IS IS iS 1 IS IS m I'D IS iS CO IS ITi 1^1 s ; IS iS OJ ro ro -rr ^r \n lOl Xi

79
C'-J 1.M 04 iM i?J iM iaJ iM l?vl O-J i iS-i1 i3 IXI 1 131

i3Zi 1 1ijD1 T

T

El 1 I : 1 LU 1 LU 1 LU 1 UJ LU IJJ IXl LU LU l-U ijj ijj 1 1 I.U 1 CO i CD '£| El ro ro r- ro r-- Q 1 ._l i iJi ro ijj ro U"i OJ r-- i.£i ^ 1 _1 1 \r iJl in Ci "T on |j3 r-- OJ iTi 1 LU 1 in \n ro i-D 03 r-- 1 *—J J 1 LU in iT: iji' OJ 'D 03 ro 1. 0 1 'J- ! 1 fNj g:i '.JD CO io r-- ro iJl i.jii OJ on 1 iji on on r-- r- r-- IX) i-£i U1 LO Ln fL 1 1 ijT ro ro ro ro ro r^i ro ro ro ro ro ro 1 r— ; <r 1 1 LU i3 1^1 i3Zi i3 iXi ijZi 1 a 1 1 -J

rUJ

0-:

LU I LU

IXl on

lijI LU

LO

UO

ri3

IJJ

roi OJ

Ei

El1 1x1 I LLl UO

ElriXi I ixl

r-- I IXi OJLO

uo

r-j " —I El

iTi

IXl

roon

IXl

IX

r--

UJon

OJ

iji I LU

OJOJ

IXl IXl I IXJ

iXi uo

IXl

T

OJ

IjO

LU 11 El El1 El E El El El El El liJ El El El 1 1 1 1 1 1 1 1 1 1 1 1 Ul LU 1 1 21 1 LU Ui UJ LU UJ IXi 1x1 LLl LU LU IXl UJ 1x1 1 i_i 1 ijl iJi El UJ lO' El r-- vr in UJ 0" 1 on OJ LO El i\i iji ifi ro ± 1 1 _I 1 OJ 'jn r- Ln 5- 4 o-i r-- iji r-'- C4 DC Ql 1 ! ' IXl r>- 00 E iJi iji iTi E 0,1 LO iTi h- UJ ! Z3 ! CO ro r--- OJ IV iM IXl 'Xi 0-J r^- OJ r^- LU u"j 1 i r ' IXl in roi iSi E IJl 1-J3 r-n E on ai ? 1 ITi Ln U"i Ln in '^f ro

Ll_ 1 o 3 1 El 133 El El El El El El Ei El El El El tn 1

El E OJ 'X' OJ IXl El IXl E IXl E E El El E E El OJ OJ ro fn El iji on 'Xi in ro OJ El Ul on E iTl iTi gi IJl iji Ul Ul Ul Ul IT) on on E E El E El El E E El El El E 1 1 >s

li: 1 E IE E E E E E E E lE ivi E 1 E Ul E in El in E LO El in El in E

Qi

•^

q 1 E E OJ OJ ro ro in LO ID

80
_lU)

U.

<x

1-

o:o

u_

tnf-in

cn

UJ

a:

(=) LU

LUQi

(-

u

LU

Of •CL U- ^ o

CO 2:a X 1=) 1-1 14J X

tn iji I t~-* u

LU

a. 1 1 1 1 1 1 j 1 1 1 1 1 IS i3J i33i i3Z' 1"^'' t !J7 1 T { 1 1 1 1 1 T 1 1 1 T 1 

ij.j i.Ll lU UJ UJ ixl UJ UJ Ul IJJ UJ Ijj 1 1^ J i3D f- 'D Oj \n i'O I--. |-|'; iXi 1. fi l-C) 1 _J 1 U'f IjJ UJ 03 ij '1 Ul IXi iTi 03 1 i 1 O'J 'oil UJ LT-i 133 133 ro

lO I-- r]- ro C'-.l ir-j 'Xi

i.JJ r-- 0.") ro ^r IXi 03 i3Ii C'-J 1.x CO 'X' ro ij'i r-- IJI ro OJ i33 03 1.x

I'^i I CO Oj OJ Cj iDj r- Iv._ r.- r- 1- iXi i.X

0-j 1 C^J !1

133 GZ' i3J i3Zi i3Zi i3Zi !33 i3Z. i3~' 111I] 0-J C-J OJ i'-n ro roi ro ro ro r-'j ro [-(-,

-T- i 13 i i

iIL' 1 1

1331

1'^ ; 1

i3J1 T

T

i3Zi

l~' i 1 UJ ij-i IJJ UJ IX) 1 UJ IJJ IX Ijj UJ LU !-jJ 1 IJJ 1—1 1 'XI ro O'J 1.0 •Ji ro r-._ ij'i _1 1 iXi Oj LO Oj O"! Oj CO r-- 1 1 U J 0-J rof X 03 U3 'Xi 03 1—1 1 Oj LTi OJ 5- 10 r'3 rj i.X LU >D 'O 'Xi 'X XI Xi I.O r>- 03 1311 OJ

r>j ro OJ ir.i in Ij"! LP IXi IJI IX '.X ^ 1 130 I'ji on r- UJ IT) T' CO Oi iji iTi iTi U| ij^ iT'i UJ iTj 'ST' i3D i3Zi d 1331 13 i33 '3Zi

LU 1 1 1 LU 1 OJ i^j OJ OJ '1' CJ C'J OJ OJ CJ C-J OJ OJ n 1 133 V

1331 i"vi 1 T 1 T

i3Zi 1

i-i 1 '33i iTI i3Zi

T

UJ i 1 x 1 1 LU ijj 1 UJ UJ UJ UJ UJ UJ 1 UJ 1 UJ 1 U_l 1 UJ UJ 1 0 1 1J1 ro LO ro 133 r-- iXi i-Xi OJ ij3 r-- 1331 QJ a 1 1 t*-< j r-- 03 iji i33i 10 iXi r 3 OlJ iJi i —1 1 IX iji U"i Oj iM i.X i.X r-- roi a. 1 1 _j 1 1331 03 03 IXj 1331 ro r>- C. 

I'O

iXi 03 03 ^- r''- r-- K. r'- r-- 03 O'l 1^:

W i 1 21 1 <r iTi in iv ro iji W.' r^- ro iTi I.X El iXi iji iTi 03 iri 133 r- r-- IX 1.0 ro ro ri3 roi ro ro ro ro

1331 13:1 1331 Si iS iS i3D i33i 133 1331 1331 1 u ! 133 1331 CJ 1X1 iJi CJ <.n CD i3~i i-X 1 a 1 133 133 I'CI 133 1331 ijj CJ CJ ro 1 LL 1 iS iTi 03 r^- 1.0 LTi ro CJ iTi 03

r—i 1 1 1331 iTi iTi iJi iJi iji iji iji IJl iji 03 03

0) j 1 J1 _j 1 .T G) iS i3Z' i33! 133 133 133 1331 i3~i 133 1 J4 K: |V 1 133 133 133 1331 ID '33 133 i^.J '331 is:. I 1 iS I.O 1331 W) iS IXi 1331 IXi LO '3!j u" 1331 1 0 1 i33' Ci CJ r»3 roi IJ"

81
jj -} sT

Tr i j Q iS i2 ~, 13i E:1

iTl1 T

El!

1—i E- E El ! O ! 1 ixi i UJ 1 Ijj UJ Ijj jjj l_L] '4 !-U ijJ ! UJ U J i 1 LiJ i Ci iJi 'D in ij" iJl 1.0 !'- IJ"i iJi 1 _j ! e-.; ro r- !-- in ! _J 1 ro LO r- r-'i i;D i-'l i.£i ij-i fj 1 r- r-- IT'! r-- i-D \n ij" ijj 1 zZ 1 Ci Ui r-- 1/--; El ij! CD r- |j:i U'j 1 >£.' r-i El IT! CO '.n \n ro C-J 1 GJ i OJ i OJ i

lEi El E El E El Ei 1

El 13 13 El E El El El E CD E 1 ;—i

iJ!

UJ

-J

Uro ro ro ro ro ro ro ro ro ro ro ro ' ro

El El E E iS Ei El E E Ei El E El

2: ! i i 1 i i i 1 i ( ! 1 1 1 El ! UJ UJ lii UJ UJ UJ UJ UJ

ro IJl r- 10 OJ i.£- LO

..i 1 iJi CC c-\ I.JJ iTi E Oj

_! 1 Cj lT| 03 IJi uo iJi IJi ^ E r13 ro Ei El El E CO CO El i£i -r r 1 r\; CO in CJ IJl r-- irj ro CD Ei iJi Ui

Oj LO iTi O-i !.£ E 03 CJ 1 o iJi ro

•^r i ro ro 0:1 E E Oj ori t'- i£i i£i

i.Ci !.£' i.£) iXi 'C> I..0 i-Jli UO LO uo UO i.n El Ei El El IS E E El El El E El El

iTi

i-J UJ

z:

Qi

£5CO

ILU

LUI

UJ

Cm 0-J C-i O-J 04 CM CM L"'J CM CM CM OJ E El 13 El El 131 El1 El

"l IS1 El El 13 1 UJ 1 LU 1 UJ 1 UJ UJ UJ UJ UJ UJ 1 UJ 1 UJ 1 UJ 1 IJJ 1—1 I OJ LO u> r-- i£i Ul on ro on El 13 i£i iM i3 LO 0-J LO El ro Oj UO

_J I r-- Oj r- i.Ci I- Oj r- Ul ro 13 13 —J ! ro Ui r-- W) ij:i Ul OJ 10 13

13 Ul Ul Ul LTi i3 'Xi OJ Oj

LO CM iji OJ Ul

m OJ El r-- in

LTi LO ro ro ro ro ro CM OJ

iM C-J CM CJ I?J OJ CM CM OJ OJ OJ CM OJ

El i3 E El El 13 E iS El El El .El E

13 3 CM i£i IT' OJ i£i i3 in E i£i 13 13 13 13 i3 CM OJ ro ro

03 r^ in ro OJ 13 Ul 03

i3 iTi Ul Ul Ul Ul Ul Ul Ul Ul Ul 03 C3

1—

Ei El i3 13 El 13 13 El El E. 13 El K K J4 K ?i 3i Jt El i3 i3 El El 13 E E 13 El i3 iQ i in , iS in Ei in '£1 in El in El U" El

13 i3 OJ OJ ro ro

M in LO l£i

82
Ijj

lU

IZX

X- 1111j in in in in in Lfl Lf:i LTi i/:i IJj j El iXi i2;ii Ci 1 1 1 1 1 T 1 1 1 T 1 1 LlJ LU ijj LU UJ LU U.I UJ UJ LU i.ij UJ LU

h^i j N. ij'i CO r-- PJ CJ LO

_| 1 rv •Li f'-,' i/j i-ij LTi IJJ i-Xi o:i Vj' _J ( f'J LT.i iTi i.£i r- iTi yi ro

''J" '•£1 ixi 'Xi i-Xi ijj i3 Lfj p'..

H 1 i.Xi i3 r<:i IV.

m 13 r-f'j Ln in C'l iXi O-J iS-i r- P-J r>-

Q 1 IX) i.£i i-Xi Uj in Ul I'O i^j ! C-J C'J i?-j OJ eg I.M O-i CJ i"-j CJ 1 iS i5^' g:i 13 CD CD

ro fO !0 Ki 10 ro ro ro ro Ki ro

i3 131 1 13 '3 Ci i3"i iXi CDi 13 rr'i 'Xi

l_J 1 1 UJ 1 UJ IJJ UJ 1 UJ 1 UJ 1 LU 1 UJ 1 U.I 1 LU 1 UJ 1 UJ 1 UJ

i-Xi O'J Qj 10 ^ IX iTl in i'-) rjj

l.'-j 'd'l 'Xi C-J fj in lAl fO iXi IV a-i Uj

Zs 1 iTi 'd" ITj iTi iM r-j 1—

I.X1 1.7^ Oi |-'.- i-D in iTi CD i.jD roi ro

LU r- OJ iXi ro i3

m r-- lO a\ in

M rv IX' Ki IT. r^- i-X i3

^-t 1 ro ro Ki iO ro

lO

UJI 13 is IS 13 CD izi i3 Ci

i_i Ii_j I

ll-

._l

'X

iIj

UJ

i-

•X

|VLU

ro ro T'O ro ro ro r-o ro ro roi roi 131 i31 131 3 13 '31 3 13 3 iS

t: I 1 ijj 1 LU LU UJ LU 1 LU 1 UJ 1 UJ 1 UJ 1 LU 1 LU j LU 1 ixi Q 1 iM i3 iXi roi in in 13 ro iXi 'Xi ro

LO LTi o: r-- ix; cr-i iM i3 ro 13 rv.i ij-i ..J 1 iTi r- in 03 cri xf iXi in

-J 1 in Q-J in iXi ro 01 CO IXI in IXi iji

IX. i3 OJ vT 'X ai OJ in CD pj 'X' 13

H 1 Ki iTi ro r^- in (El xr 00 r-o r^ CJ

iTi OD 1^- rs- 'Xi iXi in in XI- ro r--) OJ r-j

LT) in lf7 LO

m in in in in in ij-i in

i3 Ci i3 13 13 IS 13 i3 13 IS '3

13 OJ XT 1X1 iTi iM 'X' 3 in IS 'Xi '3 13 13 13 13 '3 <?! OJ ro

i3 iTi 1:0 I.X in xf roi OJ 13 1X1 3 ijl iTl CTi iT> iTi iTi iTi iXi X' IX OJ oj

13 IS 3 3 iS 13 13 IS 13 13 3 iS

>i 5.:> i3 i3 13 1x1 '3 IS 13 iSi 3' 3 lij IS 13

13 in iS y-i iS in iS ir.i IS in 3 ifi

iS i3 OJ 01 roi \f in in

83
I1

LU 1 (=i i liJ El iS iSi iS IS l^i IS iSi IS IS iS ft 1 LU 1 ^ 1

Ixl IJJ IJJ UJ IJJ IJJ LU LU LU uJ LLl iJJ !> 1 I i_i i G' IS IS IS IS IS IS iS iS iS IS IS IS LU 1 :!= ' El 13 IS IS is IS 'S IS IS is iS IS IS -< li: ! i _J ! IS iS IS IS IS iS IS iS iS iS IS IS

Oc: uj 1 1 _l 1 g iS IS IS IS iS IS IS IS IS IS IS 1 ID IS i (Si IS iS iS IS •s IS IS IS IS en i Ci iS IS iS iS iS s iS i

iS IS is

~' 'I 1 iSj IS IS IS IS IS IS IS IS IS i IS

2: :r i LL li: 1 o 1- ~. 1 Ki s iS IS is iS iS IS iS iS iS IS iS

•s* iS iS iSi IS iSi iS iS iSi iS iS : 1^' 1-i.' iS iS IS iSi IS iS iS iS iSi iS' iSi ~?~ 1 O 1 LU LU LU LU LU LU ixi LU LU LU LU LU LU

CTi iXi ro LT: U'l iS CM iXi IS LO

_J i Iji 1.0 iS CU ej lAl US 0-J CO LTJ —j I I ~l pi~ 1^1 I-Jll ro j-p-J '4

ro IJi Cci¥ 1"^.J iSi r-.._ bl r-j IS f- ui ^ i 1J-, iTi CO 03 c:i Oj Q'J r-- r- i-- IjJ !.£l r-- r\- r._ r-- r-- r-- r-- r- r- riS i >T: lj\ IJl Ijl IJl iTi iTi ij-: iT-, iTi iTi IJi G"-. e-i 1 IJl iTi IJl iTi Ij. iTl iTl IJ-. iT, IT, |T1 iTi r-j ! IS iS IS IS iSi iS IS iS iS IS iS iS IS

IS IS IS iS IS IS IS IS IS GZi iS iS IS

~. 1 1—1 i UJ LU LU LU LU IJJ LU LU LU UJ LU UJ UJ CO 1 iS IS ITI iS IS Ci iS IS IS IS iS IS « i u 1 § iS IS IS iS IS iS IS •s iS IS ;3 1 1 _! 1 iS iS iS IS iS :S IS IS IS IS IS IS UJ ! iS IS IT: IS iS IS :S IS IS IS iS iSi 1—( ) UJ E ! IS IS IS IS iS iSi iS t— cfi iSi IS is iS

Ll. 1 ! r-.j iS IS iS iS IS iS IS IS IS IS iS IS t t- 4 1 li; IS IS iS IS IS IS IS IS' iS iS a 1 h- 1 i IJJ <r 1 1 LU IS iS IS IS iS iS IS iS iS IS IS IS IS 1 -J

•X

a-: a

a:

LU

Ll ! iSi iS O-i iXi iji C-i •n IS IT)D

IS i

IS IS r-i i?.J ro

li i IS iTl (V 'J-l in 'i ro OJ IS iTi 03 1 IS. IT| Ijl Ij) iTi iTi iTi .j! lJ-1 Ci iT-i 03 03

_!

_l >s IS IS iS iS iS 13 IS IS IS iS iS

J* 3-; IS iS

iS !J"i

5-; ^i J-i ?? Jt J? JS

K

is IS IS iS IS IS IS IS 12 s

ITi IS IT; iS uo iS ITl IS LO iS

i?-J roi ir.i 1.13

84
Kc El El 1-i.i El El 'iJ El El 1^1 E E El El E El El El El g:i El Gj E El E e'i

i H i

1 O 1 LU LU UJ 1 r 1 UJ UJ UJ UJ U-l I'l 1 UJ t_u UJ

\D Oil El El CO iTi Ul r-._

-r-j

1 1 1 'Xi 'Xi OD ij'i iXs fo

5i- El i.JCi LO r-j- _J ' El rn iT, CO El i3"' El h": CO r ! r- 03 o:i rv. iJ \r> i-T; E T-'r OJ r- fj r- L1 Ul m r-- r- LTi 1

r<:i iXl xT '-r si 0-\ ! iJ: iTi iTi iji iji iTi Ul Ul Ul u. Ul Oi I K! E: E El El El El Ei El El El El El

13 Ei El El El El El E i~ El Ei El El El El Ei El Ei El E El Ei E El

T. i O ) Ll! UJ l-U UJ UJ UJ Uj UJ UJ UJ UJ UJ UJ

0"! rr. n- 0"i i~i El rr. rn _J 1 ro Ei ^ •JJ iTi El CO Ifj \r: r-- r-- th

1 1 iTi El El El iji.i El fl o::i r- i.£i E Ul o::i r- iJJ UO Ei Ul

UJ 31 1 El E El El El El El El Ul !J

i

iji iJi iTi iTi m IJ-, iJi iTi Ul Ul Ul Ul CO

Ul iJi iT-. iTi iTl IJl CTi Ul Ul Ui Ul Ul U: 01 iTi iJl iTi iTi iji Ij-I U! Ul 0"i Ul ,Ul Ul iTi UJ El El El El E El El El El El El E E

E El El El El El El El E iT"i Ei El El E El El El E E El El El E E ^ i

IJJ UJ UJ UJ UJ UJ LU UJ UJ UJ

! 1 1 ( CO lA! El ro Ul ro E i \r) Uj l-J-l i.n Ul hi Ul i.ri 1

r>- 2: 1 i —I 1 y-i ro IJl r-.- i?:i m OJ 1.0 iT-i Qi i 1 _J i \n U"i Ul Tj- xr XT \r ro fl ro ro r-.i El 1 CO n;i on Oj 01 CO CI CO 03 CO 03 03 CO

<ft I 1 51 1 Ul Ul Ul Ul Ul Ul Ul Ul Ul Ul Ul Ul Ul Ul lUi iji Ul Ul Ul u, Ul Ul Ul Ul Ul Ul

Ul Ul Ul Ul Ul 0-1 u Ul Ul Ol Ul Ul El E El El El El E Ei El El El E! El

1 El E 'Xi Ul rvj i£l E i.n El IX I El El Ei E E OJ iM ro ro U- 1 i Ul CO r -- . i£i U" fO CJ El Ul 03

1 El Ul Ul Ul Ul Ul Ul Ul Ul Ul Ul El 03 El E E E E El El E El E E E

E i K ?S n 5-! J! ^" J? 5;

i E Ei E E E E E E E i^i El E E

1 E LO El Ul E LO E IT; El Ul El Ul Ei E El :^J ilJ PI r-i TT \r Ul Ul

85
1[! 1j 1i! 'ZD CD i3Zi 'ID 'ZD

G j —r- 'ZD iZD 'S3 'ZD '3D 'ZD 1^1 'ZD 'Sj G ' 1 ! IJJ IJJ LU LlI 1 1 1

LlI IjJ LlI [ 1 \ UJ IjJ III 1 1 1 j 1 * }

iTi (.._ I.J~1

r 

M 1 ! iff 1, J *3D ni P,J jTj '-D 1 ._J 1 r- "X! iXi rri T'-j |j3 C-l 'Tj r- i3 r- C4 i-n !"•-. !- in 03 r- iji r ' T-- r-- i?-J r- '?j Gi !

03 fj LT j iM IT, r-- ro iTi 03 'X!

i3D i r-i IMM 13 C!G j on 03 iXi 03 03 'jj 133 03 03 03 03 03 i

r- j i — i

iS Gi Gi '3 di

G 133 GiG : 'ZD 'ZD '3 Gi 'ZD 'ZiZ' Gi Gi G j 'ZD 'X< fT"i 'ZD 'ZiZ' r"> 'ZiTi 113 'G

—T- 11 1 1 f LJJ 1 1 1

UJ Ijj 1 1 j UJ Ll !

ijj Ijj UJ UJ IJJ UJ 1 i 1 'J J 1 1 IS") 1 rt 'T'f iZLZi 'j3 •"'J iT^ 'XI ro 1 1 1 ro P' J P'- 'XI jj-j n"i Ln )J-I 'X' 'jZj .J i 1 _J 1 0.1 (<-) ro ro V-i i£i '3D iB r- iU 1 I iTi U~i r-- iTi G '•iZ' r-.. t LlI V 1 1. '"-j 1. j Gi i53 iTi lT"i iTt Q-|

Ll. 1 [ M '-jZj I.J3 i.£i I.J3 iXi Uj W) 1?) in l/j

m LT) ^ 1 iJl G-1 IT'I iTi iTi iTi cn iTi iji 'ZTi iji iTi j ! iX> iTi iT> Ij! iJi m iTi iJl iJi iTi 0"i iZT: iTi iJi h- ; ac ! i tu iS '3 iTj ei IS in o G iZTi Gi 'G a 1 1 _J

r-<:i

Li.

IU 1 iSG

G Gi iGG

G iG

GGGG

a 1 G C3

G

g iG

GG iG

GGGG

Q 1 ^ !

IJJ Ll) LU IJJ UJ UJ UJ JJJ UJ UJ ^ i ij3 1 1 ^ Ul r-.j ro '.j3 LU 1 133 r- G r-- 03 CJ r-- G

a: 1 2: I 1 _J 1 m iXi iXi 03 03 03 03 03 r-- I.X Qi IJJ 1 ^ 1 : _i 1 ro OJ G iTi 133 r- Ln fi i?J _i 1 G G G G G G G tg^ i 03 1 1 r 1 iji ij-i iTi iTi iJi i7l tr-i CTi iTi iTi 0-1 iJl n 'X 1 iTl iji iTi iTi iTi ITI iJi 0-1 IJI IT, .r 1 0"! ij-i iTi iJl iJi 0-1 0-1 iJi iTi iXi iTl LL ac 1 C3 1- :n 1 iG G G G G G G G G G G iG G

a:Ci

h-U 1 G

G CJ iXi iTi rj 'X'

G in iG i.Xi <T ! G G i G G

!i

iM Ci l-o

Ll. ! G a-1 r- in ro

G (Ti CO 1 G iTi iTi iTi iTi iTi iTi iji CTi IJI 03 03

_J_J

G

G

G GjGGGGG

GG

G

o:a

UJur

<x: 1 yi ?•£ J« J-i

n J? Ji j; n: ! G G G G iG G G G G G -Gi i G G in G in G in G in G Ul G

g:o 1 G

G CJ. r<3 ri -r in LO 'Xi a;

lU

86
JJ1jj 1 1 I!1I CD CD El El El lEi Ei E' El E; El El El J . IS El El EJ El iS El El El ra E E E I "ZI i IJJ ixl iU 1 1 i Ijj IJJ 1 Ll ixl Uj UJ Ixi 1 1 

I C'-i r~: CO El iJl IJO I'-n 4 I i ._J 1 ir> ro ~r i.JJ El I'O liO El EJ iXi in 'Si

0-J ro i.jO CJ cri CO iji CJ i.X CO i-X

IJi r.j ro fO El i-X Ej ro ro C'J IJJ ro

iLl 1 'D ^ ij. in r- C'J Oj ro OJ ro r-- CJ El Oj IX' ro CO iXi ro 01 IX 1

C-i OJ C'-i lEl El CD El IT1 iji o'\ 1 i.£i IX' i.jj '-£i •X i.X IXI iXi iXi 1X1 Xi !Xi LO 1

CD El E El E- CD- E- El i3 El El CD ;1 I 1 El CO El E El EJ El El El Gj El E E , CD E El El E CD El CD E E El Gj El 1 ~i- ] Cj ! iLi LU U.1 LU LLl 1x1 LjJ UJ LU 1,U IJJ W Ijj ( fi j \~) 1, '1 CO Oj El C'-J E El oj 'E 1 i _J 1 iji iS.j iJi iTJ -7 El •^r OJ r- i ! >J; rn 1

h") r-;< El !Xi jj ij 1 iJr iM 'Xi LU 1 i Ll"! LO ro C'J 'T' f- - L~i iTi Ij'l LU ! 5: i !'') C J -^-1 El IJI 03 Xi jn ^r r-o CJ Ei IJl 1 : ! f-J ijl iji iT'i iT> 0"! n~ Oj Oil 0"i 11 iTl CO l\_ UJ CO i5:i iXi CD CO Oj Oj 00 65 CO oil Oj

vC j ij'i 1 <7^ iji iTi iJi iTi 'Ti iJi O'l iji ij! IJi iTi ijf h- i <X I i_Li i El El Ei El El El E El El ID E' je El S 1 ! 1 Ql 1 1J_ I I 'ID 1 i 1 I 11 0"' i . h- 1 — - 1 _j 1 LU ] —I 1 ' J j W' ! I—

1 Ill t r;_;i I a. ' 1 1 

1 El El El El El El El iS El El El EJ El

Ej El El El El El El El E' El El E' E j Ll i 1 1 1 

'2Z 1 LU Ijj l-U IjJ LlI IJJ li-l 1x1 LU UJ IU JU UJ > 1 e: j Cj i G"i C'J IX' E El CJ C-J ro

[i-i 1 IT! iT'i Oj -rr C-J IXi ro Xi IX El CO CJ i ! 1j~ IJJ ro lh r... r\_ \\. iXi ijo Q/ Ijj ! I 1 iTi IJ"! I'M El r-_ ^ CD i.n CJ iJi Xi 1— llJ UJ 1 !3 rn I'l'l r'"i ro CJ CJ i?J 123 El UJ r 1: 1 |J~J i: 1 r-_ r-_ h_ h_ i'.-. r- r-- r-- r-- r-- q; 2j 'I 1 iji iTi iTl iTi iTi iji iTl iTi iji iT' E'l iJi iji Z! 2: i iji iJl iji iTi Ij'l U 1 i7i iTi iji iji El IJl CT'i U- ii; 1 t o —i 1 1 1 El El El El El El El El El CD El El El

UJ i j ~" lU i j o ii:! o i 1 1 to ixi 'a: 1 _ _[ j CJ i LLi ' Cti i ill 1 Q_ 1 1 1 h- 1 ( 1 1 El iTj CJ

X iJi CM 'X iS iXi El iJJ , 1 "x O El El El E' Ei ..—1 T—

CJ CJ iXi ro

a 1 lj_ El ij-i CO r- IXi IXi r-"i C'J E 0-1 00

El ir. iTi iXi IJl iTi iTi IJl IJl iJi CO CO

El El El El El E El CD El El El El

i-j Tal !

RE ] _ .

UJ 1.j1 J- ?i ;;.> Jci 5-; lii 1 El E El E '? E Ei •XI El E E El

lT; 1^1

L .1U .1 ElU 1 El LP ElU .1 1^1 Ql

1—' E- El 0-1 I?-.' r-:i I'J IXi uo i-D

Cki 

Oi

UJ

87
iS li.1 iSi iSi iSi

153 CD IS IS IS CD IS iSi iS iS 1 1 1 LU LU LU LU LU LU LU LU UJ LU LU LU LU 01 1 in OJ iTi r\- K. IS r<"i ID IS Oi 'Xi P5 ! _1 1 _J i CVl LTi 0"i ro 'Xi 03 0"! r-- CI Ki ^ 1 UJ ro iXi CO IXI ^ r\- r-- Oil m

LU 1 CJ in 1X1 in i-D iXi iri ro CTl 1 LU 1 Ci 'Xi l"tj iSi rn IXi C-j iS' r-- U- 1 1 M IS IS iT-l IJi Ij-I iTi IJI iTi CD OD c:i iX CO iXi r-- r--. f- CC i 1 (SI IT. ij. iji 0 1 Ijl CTl Ijl iTi IJl 0"i T, iTi CC 1 1 Ul S CD '5 1^1 IP •s iSi iSi s iS iSi

LTi

LU 11 Cxi iS iS iS l-i-l iSi IJiJ Iji-I ijii-i iSi iSi iS (S iS lil iS (jll s iSi Cili iSi Gil IS IS O 1 LU LU LU LU LU LU LU LU LU LU LU LU UJ

UT LTi iXi r\i r-- C'J CC _l 1 OJ LT.i iS Ll .1 r- M OD

LTi

m o:i a'l iTl LTi nj iTi o:i CXi Ul CTl \r iS^ U"J cn rj n rn nj ro ro 00 IXi q:i ro rv •Xi IS TT az< OJ Ul

LHi C-i f^- LTi CJ IS h.- LO 0-J iji riSi ! iXi CO III [V r\. i.Xi iXi iXi Ul Ul

C-J 1 'J ^ xT T-h ^ XT 1 IS (3 iS IS IS iS IS iS iSi g;i

x

LU

LU

O 1 LU 1 iS ip iSi IS g;i iS >s IS iSi S' s iS M 1 iS CTl 'S Ci IS IS IS S s iSi iS

LU 1 1 Tl i LU LU LU LU LU LU LU UJ LU lU LU LU LU r 1 i i_i 1 KD CTl IS Oil CO r-- l£i Ul IS (D

iM Oj iXi i7l Cili iji IS'. r-i r-- IS 1 _l 1 Ul 1^1 Ul Ll M Cm iji U^i r - 1

ct: 1 1 _1 1 IS LTj iS Ul iS Ln •Si ^ Ul 01 r<i 3 1 ro OJ i?j IS <Si ni 01 r-- CO 1 i r 1 Ln LTi in in ITl in LO in

cn in iXi iTi IT, Ul U) Ul Ul Ul Ul Ul Ul

iTi CTl iTl iTi Ul Ul Ul Ul Ul Ul Ul 0"! Ul

IS (El IS GJ IS (SIi iS iS CD iSi CZi iS IS

CJ ( IS IS T-4 'X Ul llJ ^D iS U"i •s in •X 1 IS (S IS iS IS rj i^-c r-i UL 1 IS m 01 rv- <£ ITi r-1 IS Ui CD 1 CD Ul iTl Ui Ul Ul Ui U'l iji Ul Ul iX 03

._J _J IS IS IS (Di IS 5) s Ci iS iS IS

•X 1 M }•? 5c* ;>•:>

K J* 5"? Lk: 1 CD IS IS iS (S CD IS iS iSi -<S iS 1 IS If) >^ in iS in CD Ul £D to IS IS a 1 IS iS CJ Cm r-i K) V- Ll in ID

88
'5Zi '31' Sj

'3 13 'Xi 133 'X'

© Gi CD

O ! LU LU LU LU LU LU IJJ LU LU IJJ IJJ IJJ LU

!Sl 1 C'J Ul Oj PJ 'Jj a i iXi Oj 03 03 ro _i 1 m C'-.J 03 LU 1 P-.! f.n i3D m i-D CJ 1 LU OJ Ln ro IX. iTi ro U_ 1 1 IVI r-1 ro ro iaJ PI p-j XT 1 r- r- r-- !>- r-- r- p- r-- iX 1 h- 1 i CO iji iTi iTl iTi iji ij 1 'T' Ul C'l ij'i

CC i 1 Lul Si i3Zi O

(-

LU

LU i Xi z: LU a 111 o

I- 2: O) in a

LJ

LU

QiCL

'XI

LU

'X I'^t I'^i IT. - 1^

J di I'n iXI I'"! ~^ ~" rx 1^1 I'^i iX

-7- 1 O 1 LU IJJ LU IJJ LU LU ijj UJ UJ UJ UJ uo iTl nT UO 03 p-j iX IJJ _! 1 CJ El ro iXi r- O-J r^- U'l iX '£> _J 1 U~i Li) ij3 Oj r- <jl iXi ro

;\_ LIM r-'i I'Ji lj"i LP. OJ in IJJ Oj -|- LTi r^ P-J f-1 ro 03 ro 03 ro

'.JD PJ iJi r- i?J O'-i r-- 1'-

ilili 1 iX' iX i:ri iTi 133 03 03 03 r-- r>_ -j ro ro ro ro ri3 ro ro ro h3 1 1^1 iXi iX i3 13 iXi iX iX iX' iX

IXI

iXl 1 LU 1 iX El E' El El El El El E El IX a ! iXi IX El El El iX El iXi iX

a 1 LU 1 UJ 1 SI 1 1 1 LU LU LU LU UJ IJJ LU LU LU LU UJ LU UJ > 1 1 1 LTi |J\ P-J P-.l r^- i-Xi i.n IXl PJ Kl LU 1 a 1 r-- 'Xi in LTi pj [•- ro 03 PJ -< 1 1 -J 1 iTi pn ro p-J E IX: PJ ' o IJ'i DC LU 1 S: 1 1 1 . P- 03 \f r-- El ro LIT 03 El PJ 1— CD LU I ^1 1 LO iTi roi ro p-j iJi 03 03 r^- IXI H H i 03 1 ro ro ro ro ro ro ro roi ro PJ PJ PJ i?j X) CC 1 Up iJi ID iTi iji IJ i iT. iTi IT: iJi IT-, i7i iTi 2: z: 1 iji iji ij i iji iTl iTi iji ij] U'l iTi iTl iTi ll Cfc: 1 a 1- XI I iX iXi iX iX E- El iX El El El El O 1 El El PJ 3 'i'

iT; PJ i-X IXl IXi a: I E iVl E iTi El CJ PJ r-3 LL 1 E 1T1 03 ^- iXi in OJ El ij"i iTl 1 El iTi iT-i iTi ITi iTi !ti iTi iTi iTi 03 IX _i

_i El E IX El E El IX El iXi E 1 >4 Q£ i El 133 Si El E El iX E iTl 03 i.ij 1 E LTi IX LTi E IXl E LO W) E El o i El iX |>J PJ roi v.i- IX LO 'Xi

89
El El El E: E 13 El El El El El El IS 13 El El E El E El E E E E

LU IJJ LU LU LU IJJ LU lU LU LU LU CO 1 in C-j i:m P'- El 03 i?-i El r>- Q 1 _j i lA! CO r-- iJi f~'':i C-J iTi Xl '! ro

_J 1 _] ! f'-.l Ijl Oil iXi LU i CO fO U".i r- I-- 1.J3 i

i uj E ; iJl 1 '"1 1J3 i.n LT Uj

1 r-a C-J El Ei iXi f-- r-

-J ! LT.i LT' m W; LO ^r #

<r i

1 !J1 iTi Ui iTi IT: iJi Jl Iji iTi iJi t

•'

i ijj Ci El El El E! El E Ei El El El E!

LU

Lu

1

i El El El E El Ei E El E E E E

i El E E El El E El Ei Ei E El E E

2: 1 Ci 1 LU LU LU Ix! LU 1x1 1x1 UJ LU LU 1x1 LU

Ln iTi I"!"! El IJJ ro O-J ^ iXi r-- _J i rj 'Xi Xi ro CO El c-'s ro in CO ro -J 1 1.1:1 w> iTi rci IX) El ro iXi 'T: OJ is E

r 1

lj .1 rv. IJJ ro 0:1 ro iTi E iTl 1X1 iji XI r--. r-- CO ij-i El xr El Oil iXi C-.J Ei 0:1 C-J E 1 1x1 in iXi LTi U'.i LO •^r OJ Cm C'.J C 1 rvj C-J i?j C'J C'.J 1?

' OJ

El E El El E E El El El E El Ei El

1-

RE!

1'

1 1 [Jj 1 E El El El E El El El El El El El El

P> 1 El El El E El E El El E E E E E

ft

LU ! S 1 LU IJJ UJ LU Ix! UJ UJ UJ LU LlI LU UJ %

1 0 ! Xi r-- ro iXi ro El ro iTi i'- OJ UJ iTi r-- iXi r^- E 04 ro roi ro E ij'i 1 —> q; 1 _J i r-- iji OJ r"; roi IE IXi 03 iji 03 ^ CO 1 S i 1 _J 1 cg El r^- IXi iTl 1X1 i?j 03 Tj- 1X1 —:

1 ^_ IXI ro CJ E iTi 03 ID Wl ? OJ

D" ! ! x: ! r-- r-v- rv r-- h- 'Xi 1X1 1X1 '.£• Xi 1X1 1X1 1 Qi ri 'I UJ 03 03 03 03 03 03 03 03 03 03 03 1 z :r iji iji ij-i IJl 0"i iJt iJi iJi iji ij.' iTi iji 1 U- iii 0 h- El El El El El E E E El El El El El 1 LU 1:0

0 1 El E OJ 'Xi iTi Oj 1X1 El E 1x1 •E E 13 El El IS r-J ro roi Ll 1 El iTi 03 1X1 LTi 10 OJ El iji - 03

1

1 Ei iJi ITl iTi iTi iTl iJi 1T1 iTi 0-1 iJi 03 03

_J El 13 13 El E El El 13 E E El El

if: Si ii 5': ;-i 13 El 13 El 13 15 13 El El 13 13 El

13 in El IXi El UO i LO 13 LTi 13 LiO 13 El CJ OJ ^3 10 ITi LTi 10

90
IS iS iS IS IS IS iXi IS ss

IS T. !

iSZi IS iSi iS s iS IS' i!i.i iXi

O 1 UJ LU LU LU ixi UJ UJ LU l-U UJ LU UJ LU

01 1 03 Ln ri iji O-J U'l i3;iT ro Cj i -J i IT. I.J3 u-i n I.J3 iTi 03 03

_l 1 _l 1 iZl 03 iS rn IT-. in LP iXi IS ^5" IS

UJ i 03 \r iS LTi iTi |j3 1 LU Z! 1 h- IS iXi |^J C3 ro 03 iTi 03 Kl

Ll. 1 1 M 03 P- r<3 iTi y-i T'-i r'3 f3 ro ro iM fj p-i OJ ! 1 CO 03 03 C3 03 03 133 03 03 03 1311 03 03 03 1— ] 1 Lu! 'S' IS 'S iS iS CD iS IS IS iS IS A 1 1 _l

UJ

_J 11 r—

•—>—

_„ 1 iS iS' '2 'S' iS iS 'S' IS IS' IS 'S' 'S 1 1 ! 1 I 1 t 1 11 O 1 IJJ UJ LU u UJ IJJ LU UJ 1x1 LU LU LU IX! 03 iTi iTi Ln iT] '? j IS ir.' 03 r- Ln l.±! 'Ti r- r-i r>- 03 'Ti S 1 r<3 ro OJ T'- iTi 03 ro ir; hi iXi I--

iXi |j3 Ln i.j3 'X' !- r--^ 'T, i"J '"J LO

03 'S r<3 IJ3 '33 IS ro i-Xi IS

J

03 i?J

IJ3 03 iS i"J in r-- 'Ti OJ ij 1 IS 1 Ln ro f'l OU s iTi i3"'i '33

1"

J 1 iXi iXi '33 '33 03 03 '33 03 r-- r- r>- r-- r~ OJ : 'Si 'S IS IS iS' iS 13 'S' 'S iSi iS

ClL

LU 1 O 1 Ct 1 UJ 1 iS IS IS IS IS IS IS ITI IS iS IXI G 1 iS iS 'iv' IS 'S 'S 'S iS iS iS O ; UJ 1 UJ ! i z: 1 UJ LU LU UJ UJ LU UJ UJ LU LU IXJ UJ UJ

I> 1 1 i ^1 I 'XI iXi 03 OJ IT, iS '?\1 IS ^3 Ln ro rO' LU 1 S ' ITi i.£i i- IXi iS 'Ti '33 LO iJi IT. ro -< 1 1 -J 1 03 03 13J i^j 'Xi 03 Ln Qi LU 1 15 ; 1 _l 1 iS IX) 1J3 03 ro in in ro

1- 03 IXl 1 I 1 U3 <JD iM OJ 03 ro 133 ro 03 ro 133 UJ £ i iXi 1 t r^ ro P3 '"•J iS iTi iTi 03 Qi s 'O; 1 ID Lfl Ln L3 Ln in Ln m Ln LTi z: z: 1 IT; iTi IT iTi iTi iTi iTi iTi iji IJl :fl iTi • if: Lu Qi 1 o 1- :s 1 S IS iS iS 'S iS iS iS IS ISi iS 'S IS

LU 03 1

i'_) 1 iS IX' 'X' 'Ti '?-J i.X in Gi ID X IX' 1^! iVt (\I ro

U- 1 IS iTi 03 rv ir.i roi 13J ijl '33 1 IS iTi iTi 'Ti iT. Ui 'Ti 0"! 'Ti 03 '33 _i_J iS iS 'S iS IS iS Ci tin 'S iS

>-i 5<:

K ! Q ri 'S IS IS IS 'S IS 'S 'S 'S 1 iS in 'S LTi iS LTI IS IT' 'S' IT' '33 LO iS o 1 iS '3^1 i?J OJ ro Tt- if"' UO '£>

91
d CD 3 IS Ki Ci E

IX' El 13 IS '33 iVl IS El CJi Ei E lD 2- i 1 1 j LU IJJ LU m LU l_Ll LJJ Ll! LU Ll! L'.] LtJ tn i r- 'X' 'Xi iXi IT, :Ti rg ro P-- ^ LH

1-—i : _j i 4

IJJ CO CO CO 'Ti iTi C'-i El

_J i _j i GJ

m re l~l ^.- 12 LTi

U-' ! ro lT'i \r r-i r;o 1. -| i u: ij-i CJ 'Xi r- r-- CO CO m r--- l.L ! 1 r-j r* !

>Xi -tr

a Ci C-.J ?

co

in inm ro a. 1 I CO r- r- r- r-- rv r- r-..- r- r\- r- r-- 1- ! re 1 1 ijj iS Q Gi !3 ei 13 r3 Ei

LU 3 (r-J Ei ~1 El El El E: 2: i i T 1 T T 1 T T T 1 1 T i ! i LU UJ 1_U LU LU LU LU UJ UJ iX LiJ

r>- Ijl iXi CO C'-j iXi uo ro L'O ro _J 1 !- E iXi iX CO El UJ r-- _J ! El iXi r^- 4 CO r-- D Xi f- UJ

'Xi IJJ ro^ E, CO Ijl iXi ro OJ ro

D

r .J 71 ! UT ro 13 CI CO Uj r- r- i-- r-- r- CO

ro r- OJ i?-j r- p-j r-- C'-J r>_ E: I ro ro O-J C'J El Ej iji CO 0 1 ! DO uo uo LlO IjO LO LT.i Li:i U" ^jO.J 1 El i3 E 13 El i3 El El El El 13 El El

LU 1 El El 13 El IS Ei E 13 El 13 El El El a i E El 13 13 13 El El i3 El i3 El Ej El ^ 1 i z: ! LU LU LU LU LU LU l-U LU LjJ LU UJ Lli 1 i_i i iXi iS 1

iXi P-4 El PO LiO r-- Oj

r^- ro in IB IX' Ei El UO ro OJ 13 i i ! -J 1 r-- O.I r^- iJi iXi lOj CO El LO CP; iM

Qi 1 1 ._! 1 pg LO LO r-- iXi LO PO iJi IT) Ei PO

m P'- 3 i xr r- 13 PO iTi r-- iJt ro

01 1 1 '£ 1 OJ lO lO UO ^ ro ro OJ El 13 Ijl i.M Oj O-J OJ f-J OJ OJ OJ OJ OJ OJ OJ

iji IJl iTi iTi CTi ij\ iji iji iJi IT !

'J\ 1J\ tj> iS El E' El El iS El El El i3 i3 E El 1

1' 1 1 E' 13 OJ X: OJ iXi 13 IXi i3 iXi 1 ! 1 E El El 3 3 3 OJ 0-; lO ro 1 U- 1 13 iTi Oil r^- LO U") roi OJ El iJi CO i _! 1 13 iTi iJi iTl iJi iTi Ul iji CTi iJi 1T\ Oj Oj

CD \ ! _l i 13 13 13 13 i3 13 E El El 3 13 13 i g 1 -Q 1 Ta I UJ 1 1 1- 1 1 -X 1 J-S ¥: >^ ;k >; >i >; >i 1 li' 1 El iQ 13 13 El E i3 13 El El E i3 o-i El ir> El UO 13 m El IXi 13 in 13 in E 1 a£ ! 1 1"0 1 E' 15 OJ Oj Ki PO LO LO 'X 1 li: ! 1 I3i i ! LU 1

92
El El El El E E e El E CD IE lU Ci i3 iS E El El El E GJ Cti i;.;i ( I ! !JJ IXl IXJ UJ UJ UJ UJ UJ u; LlJ UJ

IJ.. r-- CJ r-.. iJJ OJ 0-] ro CJ

ci 1 _] 1 i".'i CD E. rn |-0 Ul iTl L.n O'l 1 1 _J 1 C~' iTi iji Cm i.n lAj " i iTi iJi ijj UJ 1 L". iTi i.'' '.O !-- s

r-.- Tf-l 1 LlI r i iJ".l IS u:! ijj '.0 i.£i ijj E LO

Ll_ i i r\j in ro LJ CO r<Ti El IX. Li" El UJ ^ 1 CJ C'-l i—

IJi CC \ 1- 1 (Si

•'7 1 |--';

CE i 1 UJ CD iSTi El El El E E E E IE Pi i 1 _1

a:;

UJ

UJ

—1 lii Di LU

o;n

UJ ijT 7r. ijj j- S

0"' en ^

UJ

QEi El El El E El E El E< El Et

7; 1 1 T

T 1 T 1 T 1 T 1 1 i i CJ 1 UJ UJ LU LU UJ y 'i!

1_J UJ UJ UJ IJ^

C-J iJi un |--- I'd E; l.M _l 1 r--. OJ C-i r-- ij:i 1- CO cc CJ o:- —1 i r- ij-i OJ rv OJ i.£i 0- rr \i Ul :Xi CO co r- r i IJ"i e-j IT] i.£i ro E li, 0-J IE !J"i CM

CM ITl CO 1 u:i re CM iJ; C'l I--... El 1 r<'i ro C-J CJ CJ CJ CJ C'J C! C i OJ 1 OJ ! El lE El E El E E E E E: El El lE

el: El . El El E E El cri E E El E |--, E

El E E. El IE El El El El El E El E y i 1 2: 1 iJJ UJ UJ UJ UJ

"tl UJ UJ LlI UJ UJ !-U UJ ! 1 1 j jj E iiJ r-- C- n Oi in CO ro 1:0 E ! El ro I-jIi l.n E Cj i.C ro c-i E CO C'..' i _J 1 El n in c.ri ro 1"- r- iTi cn iT; S i ! _J i Ijl in El OJ Ci r-- ro ]~0 CJ CM rci iCi j-o OJ |—

LTi i ; r 1 Ul iJi L"i i'"i Cm iJO -T i"i ro !-J r i ro CM c; CJ

i--. IV r-- r- r- \- |-- i--- 1- I- El El E E lE Ei Ei Ei 0 Ei Ei Ei E 0 1 El Ei CM l-Cl iT; CM E \n E: CO T : El lE El E Ei c: OJ i-'J ro

Lu ! El iJi CO r-- i.JJ ih rci O-J 0"! E 1 El iTi iTi 1J1 ij i iPi iTi IJl Ci Ei 0.J CO

_1

_1 El iE El E E El El E E Ei El IE

JS Si 5iK ;i

K J-! j-f 5;: r: El El El Ei IE i ; El E El E E E

lE LT E !j~i iP in 15 Ij-l .'3 IjJ E: LO El

IE El CM OJ in -r ^r in <D

93
I

1*0 i3j '31' '3D i_x> - l-it-l i-jj _'ji-i __ LJ

("T-i

'liZ' •Dj UJ i_i-i El i!!D 'Zi 1 i~i i Ul IJJ l; LU LiJ I-LJ !JJ UJ UJ UJ LU UJ

on OJ IJl CO or- IT' IT, OJ r^-

! 1J"J N- in OD i;3 OJ on !Ei

, .1 ! l.£l |\_ i3 El "•:]" cl 03 iT'

IJ-I r-- IS G' IT) OJ L'':i 0-J iTv %

i: ! |--- Cl r- 03 OJ r-- OJ iXi

C-\ A< iji iTi 2?

r--

1 LTj in in iji in in -T

1 iTi iJi IT-I iji iTi ij iT'i iT^ IT.

! 13 CI' 1'^ CD El 13 El El El

'.—i

1 El Ei Ei El El E El E El El 1'-' E El 1 7Z 1 i_i 1 UJ UJ UJ UJ UJ IJJ UJ UJ U., I.U UJ UJ U.I 1 E' E Ei El E fTl El E El E El E El 1 ..J i El El El Q El E E El El E E CO El 1 ._! 1 Er E E E El E El El El E E E El 1 El 13 El E El El El E. El 1 UJ z: 1 El 13 El El El E i E g E El E El 1 El El El El E E E El E El E El 1

1 El Cj El 13 El E El Ej El E El E E 1 iJ-J

UJ

_J dJ E El E El E El El El El El CO Cj 1

El El E E 13 E E El El 13 1^1 E E

t i

1 71 i UJ UJ UJ UJ U-l UJ UJ UJ UJ UJ UJ UJ UJ

1 El ! El 13 i3 13 El i-j El E E E E E E

a. 1 E 1.3 13 13 13 El E. i3 13 E E El E

1 —I 1 IE 13 i3 El El 13 El 13 El El El E 13 S i 1 _l 1 El 3 iVl El El 13 O El El E E 13 13

_j 1 El El El 13 13 E El E El El E El E

01 1 1 ^ 1 13 i3 13 13 13 E El E El 13 Ei i E E IS El E E E § El E 13 13

13 IS E 13 E 13 E 13 '3 E E E El

f_i i i3 IS OJ 1.D iTi OJ iXi 13 in E ijn a: 1 13 13 13 Cj E E OJ OJ roi u. 1 iS IT, IJJ r^- i.£i IT) OJ 13 iTi on

i El 0^ iTi iT, iTl IT> iTi iTi iTi iTi iTi on on

_j E El E 13 E E 13 E E El El El

UJ1-

1 ;-i ca i 15 13

1 13 in

111 o 1 El 13

Cti UJ

-1 —

K it 5-:: K y. V: 13 i3 i3 E 13 s 13 13 El 13 in El in 13 U"i i3 u-i 13 L Ei

OJ iXI ro 0 in

94
LU

i3Zi S' El CDr

"'1 E' Ei lE El 1 Ci •Sj iS i£i Er El El El El El 21 1 1 1 1 l-U llJ Uj LU ijj U..! U.! 1.L! UJ UJ Lij LlJ

O.i r- iXi l.i'.i 'O CT-i E' El iJi Lf:i _1 i 1 i"! OJ r— El U~i lO rci CM •^

_! 1 El in to ij:i El 1,0 ro

iTi •s

El CO

W !- LI"' 'x. ! Ki Oj T a-i Oj ro CM i.£i LO ro lie ij"i ro El CO in Id El on Si i ro eg CM

r-j i \r \r xr i

CM : la El o El El El El El Ej E El

Gj E El El El El 1:1.1 El El El El

Ei El E El E E El lis? E E Ei El ;E

."TT. : O ! UJ UJ UJ UJ E!

L ' UJ UJ UJ UJ LU tu

El El r- ro Ul LO E El CO OJ <- CD

_i i !'-) Ei l-Cl co !'- Ei Ei a-i ro

_l 1 ij, ro id El Tj- U'> Ci U~i El El El

Lf! O-i El r-- •sT r-.- ro El IJl 10

UJ \ CM El CO i.ii ro cr< Ei IJ: El

r-j E; Ei CO CO on El 1'.- r- r%_ r- 'E e" El

I-.- !\- r-'- r-- r\- r- r-._ r- r- r-- P- 01 0-1 Ei I-.- -LTi iTi a-i El E E lE Ei

LE

El El El El El El E El E" E El iE

lE

l5

LU i '1 1 UJ ! El El Ei El E E El El El E. El El GO

IE El El E Ei iS E El GJ El El GO El ^ i Lu UJ LU El UJ E' UJ LU UJ U.i UJ U.I liJ ! !_i 1 E' ro E E ro El ro LO El u; El CM UJ •E ! E E CM r-- ro (M li'i E ro CO ro i _1 ! i-n iTi CM ro ro CJ in f-.- r--o El 10 r-- E" i 1 U 1 CM CJ r-- C-J r- '-n El m iji yo s| ro r-'-.i CM CJ El El El E

1.0 i I.JJ i.Cl l-O El El Ei i£i i-£i Ei El £i ij" liO Ei IJI iTi IJl Ijl IJi QV El El iJi El El CCi El El iji El m El IJ-i El El Ul Ul Ei El

El El 13 El El El El El El El El El El

u 1 El El CM El iTi -..] El El llO iE 'JJ •x ! E E El El Ei El CJ CM ro ro' E 1 El El CO r- I.JJ Ll":i i r^; CJ El E CO 1 El iTi iJi Ul iTi ij'i Ei El lj~! Ul IJl Oj Oj

_J

._J Ej El E. El El Gj El lE El El E El

>iK

K J?:K 54 J? fi J!H

E. El El S El iS Ej El El E G.; iS E

El El

Q UO E' UO El LO E El E U"! E E E 0-J CM ro ro

-|- El \r- '0

95
El Ei 3 El E El Ej El El El i-^i Ei E o IS E! El E El El El E E El E El

2:t t i IJJ LU IJJ LU LJ-I LU lU iX! UJ W) 1 U", Ei 03 iJi !>'! i.U in iXi rJ

£.-! 1 _j ; 'Ti CJ in IT. Cj iTi iX) IJ" _1 1 _i i Oj LTi El T 1

'Ti |T1 03

m

UJ 1 r-- CO iJi iJl r-- El LO iTi r-j ro i UJ z: ' 03 El 0-.J ij3 03 iTi Ei OJ ro

Li_ i ! r--.j r-l ijj Lfi in iM E |T1 03 i El El El

Cl - \ r~ > ! 1 0' Gi iji iji iTi IT: ijl iTi iTi iTi IT iTi iTi •1 _l 1 1 Lu El El El El E Ei E E El E' El E

CD Zi 1 ! —I

r-Ti

!U

UJ

lE El lE Ei El E El E E El El El El El El E El El W !_U lU LU IXJ LU LU IjJ Ixl UJ UJ LU

ro 1" i iT'i El IX' ^ rji 1 i"i iTi I.' ! f-._ ijl 'i O-J 'X' IV. U3 O-J r03 'T LO Oi ITi U3 El r-- r-- iTi Ul

iTi r-j !j3 03 U" iTl ro 03 O-j Ci CO

|--, ro El .Ci IXi OJ 03 iTi ro E iJi UJ ro Oj 1,3 iTl

iXi ij3 I..L1 iXi iXi ij"i U") U3 !.n iJj i E El E E El E E El iE El El E El

UJ 1 El E E E E El iTl El El El E E E E E E El El E E lE El E El El E y 1 1 z: 1 lU UJ LU lU U lU ixl LU LU l_! LU LU 1 i-j i •'3- OJ iXi IE r-- iTi El ro iTi 1

r-- Oi I 1 El Lfi IXi in iXi OJ - 03 vT

z; : ! _J i f - 'Xi •Xi 03 iXi OJ C'l OJ CJ ' d ' CM El 03 iXi ro r-- El L;"i I.X 3 ! r-- iTi {•<'! El 03 i.X '1

iji r^- OJ CTi 03 1 1 r 1 iT iTi iTl iTi 03 03 03 03 r-- r-- 'XI

r-- r-- !- r^- r^- r- r-- r- r>- {'- r>- f-- 1 1 iTi iTi iTl iTi iTi iTl ij-i iji ij) iTi iTi iTi <n E El E El E El El El El El E E El

r

'1 1 E E OJ TT iXi iJi O.i ^Xl E IJl El 'Xi x i E E El El E OJ OJ W< ro

LL, 1 E Oj r-- iXi U3 to OJ IT 03 1 E iTi iji iT CTl iji iTi iTi iTi 1T| 133 C3

-J

_J El El El E El E E E E lE El El

"E ' K ii ii ?i 5'; ?? Ji j: Qi 1 E El El El El E E El El El El Ei E 1 El L!"i IS LO El LCi El IXi E. ir.i El ii3 Ei

iv

i_) 1 El El OJ OJ ro r>3 IXi in ID

96
I ~

CD El E E! El El El E E I'^-j 13 Ki El El I-."! E E El i.TJ E i2j

L-' 1 LU LU LU LU LU IJJ lil Lj UJ U.J UJ

CO UJ iJD El v-1 iJi E

Ca I _J i IT. iXi CD !<-/ iTj r-- El ,x. |\- r-- ro _1 1 _! 1 f". 0- in ro E E E ij'i LU ! IT, ej ro l-'l f<-l r-- E 1 LU r 1 '# IT, ro i.n IT-; 0^-1 r-- ij'i ro XT i.M U- 1 ! O-i iTi r>- i.JZi C-J E ,J: r-- LO f'-, nT I iT iTi rn o:i iDD o:i r' IJJ f- r- r 

r--. CE "s 1 1 0") r-- r- 1'- r- r- r- r-- r>- r\- i-- r>- r>- 1- > i Ct ._l 1 1 UJ Ci 13 iS i2 Ei Ei Ei Ei Ei g:i E Ei Ei

Ei El El El lE E E El El I'j iT'

X 1 1 1 1 1 1 1 1 1 1 1 1 1 1 r_i 1 UJ UJ UJ UJ LU IJJ UJ UJ- ^

UJ li! UJ

UJ ro ro CO lE E LTl i'I--..

i-''i E CJ iJl r-- r'") E El Ul r^- Zl 1 OD iji ro iTi iTl CM UJ r-- E' i.£i LO CO CO El T |T-| Ei IT, r- CO ,'-

IJ") C! 2 i |j:i i.JZi LO ij"i '7 LO LO IJl I.JJ r- IT, E c-.j LT' iTl ro r- ij-.i iT'i ro r- !£ El

El 1 lij fO ro i?-j Ci Ei El iji 'T, o:

|.j:i IXi >X.i i.£i i£i i.O |j:i i.£i ijj Ul LO it: Ij'i Pi 1 El E El E El El El E El El E E El

Hio

•I

UJ

or

LU

hQ:

tHO

a:

lU 1 _l 1 1

'1 1 LU 1 El E E E E Ei El El lE iEi E E a 1 El E iE lE E iS El El El El E Gj ^ i 1 X i UJ UJ LU UJ IJ.! LU UJ UJ UJ IjJ 1 El 1 ro ^ l"-- El i£i E' IJJ IV I-- 0-1 IXi •E i IJJ CM iri ijj IJJ iM C-i i"'- 

iJi OJ ijj ! ._J 1 Oj iTi 0-1 r- li- C-J O-i r- i IXi E

qZ 1 1 1 i£i o:i OJ on r--

m i.M ro r- El ' i j iTl ro r- uo iTi ro l'- i

L':i CO 1 1 r 1 El E: iT' iTi Oj \'- IV i.£i iXi LO ro

I*-, !"0 10 ro roi ro IT, ro 10 ro ro

O'-i cr, iTi iTi IJI iTi iTi iTi IT, O'l IJl iTi ij^i El El El E. El E El iTj a. El E El

Ei

El

|>J 'Xi ;§ El El El El

ij-, o: W- iXi IXi

iTi 1J1 iTi iTi

El El El El El

iTi OJ i£i El un E 'Xi

O-i O-J ro

10 E ITT Cli

O'l iTi iTi iTi G-i CO on

El E 13:1 El El E E K '-t Ji >J Ji >-i K 5-! El E El E s E E' E El Ei El El CO E ;o E 1X1 El 1X1 El uo E' IXi Ei iX: lyj 0 El OJ C-J , r>",i ro -f vt LTl IXi Xi

97
~'' iS IS iS IS iSi 'S iS i3 iS iS iS i3 ! i i i I i i 1 1 1 1 i ! o Ijj UJ UJ UJ UJ Ijj UJ Ijj iX iJj IJJ LU UJ 03 '.£i Oj IJ .1 r-- r- ;.3 IS

iT: ro UT rn G"! iTl in iTi iSi iS iT, ro Ol IS- UJ Oj U"i iTi r- O-i OJ ij". 03

L."i IS IT. i3 i'-o r- ro iS IS IX

U~ 0-1 iO 'XI IXi iji \r iTi Ij; '<t iji Oj r5- IS i.X lOJ 'S- \J}

f-.._ IX: 'XI iX Wl IXi \t >''' ro

CIM ro ro ro roi r-o roi roi ro |-0 ro s iS IS 13 iS i3 IS iS iS IS 13 iS

E' IS iSi IS 13 i3i i3 i3 IS IS 13 IS

IS IS iS IS IS IS iS iS IS iS IS

2; ! O i L' i UJ ( r 1 1 1 1

UJ 1 1 1Uj LU 1 1 1

ijj LU 1 [ i U J 1 r- iTi (•1 f't OJ r- LOi 03 03

f-1 i _J i i-n iXi rn in 'XI !J3 LO r-3 iTi iTi '^J" -J ; _J \ OvJ IS IS 13 OJ ro

LiJ 1 ^ i 'X' 0-1 iS iji 'Xi -1

m 'X iTi IS

'~* 1 UJ i 21 1 Ei Oj r- OJ \r IS r-- U_ ! i r^j ! Ul OJ iS Oj Xi 1" '—1

iji -'i OJ

—,

r-- >—j 1 ! Oj Oj UJ r- r-- r-- r- Xi ',.'3 IX 'X LTi 'CC \ i— y- 1 01 1 i.n I.JJ In iXi IX IX •X •X KD 'X 'X iXi IX :X _J 1 UJ ! i3j IS iS IS IS 13 13 13 IS 3 13 iS i3 o z: 1 ._! ! O 1 '

' I 1 U_ 1 Q I>- ' LL. 'T ! o : LO

IJ) i i— M 1 — 1 -J ^ ! UJ

'--^ 1 _i

*"* ^ ^~ i Lj

li. 1— 1 UJ iTl 13 IS 13 iS 13 13 13 IS IS 13 iS 13 IZ ! a C' iS iS i3:i i3 13 iS i3 IS iS !3 IS 13 R ' UJ r 1 IZI ! UJ U' UJ UJ IJJ iJj !xl UJ UJ Ijj LX tx

--=- i O 1 in r-- r-'- IXi 03 iX iXi r-- LU 1 <j: '—' 1 on Ol iXi IS OJ OJ iXi ro 'S CJ n F ' 2: _J 1 LO IJl OJ 'Xi Oj 'Xi OJ IS vr ij- 1- 1 Q; U i iTl OJ r-- IS 0-J ro ro ^ 03 roi r- iT: r-CEin 1 ~l ^ 1 m ij"i D iX 'X iXi U'l ro UJ —1 i D"; s: 1 Oj I-- u:i ro OJ SZi ij-i 03 r--- iX

iXj .:"r 1 iTl iT't iT'i iTi iTi IJI iji ij'; 03 rn 0' 03 z: 1 1 03 Oj IJJ i5j Oj Oj 03 o:. 03 03 i55 03 o5 u_ !-!- ti: 1 o o ~i i Q o 13 15 iS i3 13 IS iS 13 iS IS 13

01 i 2: ijj 1 o !- a ! '-' <r X i OT 1-":) 'O: ! O i UJ 1 Q£ i 0^ 1

IS i."J i£i ijl OJ iXi iSi un i3 ID

IS IS IS IS OJ OJ ro ro

O) i Lu i iTi Oj in LO ro OJ 13 IJl 03 CO '3 'T: iJi G'l iJi iTi iji iTi IT. iTi iji CO 03

OJ j

-J IS iS IS 13 iS 13 IS 13 IS 13 13 13 O

(0 Ul

q;

— 1

•a:

K }-S J-i ii

K J:; ;-s iS 13 13 iS '3 IS IS IS i3 IS IS 13 iS ITi IS IS ID IS LO iS 1X1 IS ir.1 iS iS IS OJ C-l r-3 ro rt IT: IXi 'X 1
1 i IS Gi

Q ijij lEi i3j El El El El El El I 1 '2Z ! 1 1 i 1 1 1 1 1 1 1 1 1 1 1 1 O 1 UJ LU UJ LU LU UJ L;j UJ UJ UJ UJ LU LU 1 lD I'^J lEi ro OJ LTi h") "'t Ln 1 i i ! ;T; U"J in ij:i OJ Ki iT'i CO Ijl 1 ! i 1 ij'i ITi iTi i.n '£ UJ o:i r- r- Wl 1 r\- U 1 IjZi iri IJ 1 1 r- y: iXi ij 'i ro LO 1 LT.' r-.] iS3 l?-J iTl ijii iTi <-.0 1 i 'jZ' 1 r- r-- iXi i.£! IXI Ln ij-i LTi \r> \t ! 1 i?J 1 OJ CJ OJ i"j OJ IN OJ OJ 0-J OJ 0-J OJ 1 1 IAJ : El El E' El I'D iS 1

i£i

cv; 1- 1 !JJ 1 El El El E" E E! El El El El El E El El El El El El El El El C) El 1 LU i: 1 UJ 1 t !5Z ! LLl UJ LU LU LU UJ LLl 1 1 

UJ LU LU UJ UJ ~> • -' j 1 O 1 r>- Oil r- El OJ Oj iTi rf rn U ! 'X Ui 1 i.r;

Ll .1 El El W) \r •'J lAi iaJ Ji —1 X i 1 ._! i iTi Ki OJ r^- IX ai r-- ijl LTi r- OJ

[%; 1- 1 i£ 1 1 _l 1 \r IX IX TT 1-X Ei OJ rn 04 Ijl in iTj h- Ii: UJ 1 m iTi i-Z- Oj IT.' CO LU — :£: 1 01 1 1 1 ro Cm (J; m IX ^ r-i C'J E) iTl occD q: I iXi IX IX IX ITi in LTi LTi If-.i in \n in 2 1 OJ El IJJ OD CO Oj Oj Oj o:i Oj w 1.x CO

Li. u- ii: 1 o a 3 1 El El El E' El El El E El El El E El

UEl E E El El El El lEi El

El El El El E' El E E E

El i LLl LU LU UJ LU LU LU LU UJ LU LU LU UJ

ro XT i/j LO CO rn i\j 1. 1"! Lr;i C-J _J 1 iTi iTi IX !\- LO ro 'fi r-- \ o ro iji ro

._] 1 Oj r- uo <£ iJi LTi 0-J O'J CO ro IX CO in LO fTi IJ! rn Lfi ~1 ^ 'X LU ro iTi U'J r- OJ r-- O'-J fC OJ r- bO ru OJ iTi ITi Om El r-._ LTi OJ r-- O-J xT i El Iji.' iTl iJi iJi ITl Oj 00 OCi tfi IX IX IX IX IX LO LO LTi LTi Lj"j LO uo

LLl El El E E El El El El E

_l

UJ

UJ

i_i

DC

LU

El OJ !-X OJ <o El E 1.x E El El a E til El OJ or ro 10 El iTi CO r-w i-X LO lO 0-.,l E iji o:i El iJi iJi in IJ1 iJi iT-i IJl 0"i iJi iji 00 00 E E El IS El E El E E

J.;- ^^ 5-5 E iTi El El E CD E El El El in in 1.1.1 in "LO El m in IS E E O.J ro ro 'J" LO L-i IX

99
El i3j El El El El El El El E Ei 1 liD :S G. 13 El El Ei E. El El El ! . UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ i UT 1 r-- 2 hi iT. CO C~' LO ro UO 1 Q ! —! i i-'i UD Oj iXi !>-.' i.JD ro o:i 1 _J 1 _l ' ro i-n UJ iji r-- CO i UJ ! 03 ? Q Oj i.n r-i G3 iXi IJI 1 LU 2 i I'l iji Ijl ro 03 f'"i !\- OJ '-ri El w iTi 1 Ll I 1 Pj r-j iT-, iTi r-- ^ CM cn !-- \r 1

r-j CJ Ci l? l i CC ! i~ >- 1 1 01 ^ ^ — -^ 1 CC _i 1 1 Ui IS El El El El E E' El El '~' i <=. 2: 1 1 _J

a. ji El El El lEi El El El iEi Ei Gj El IE E

jL. 1 1 i 1 1 1 1 1 1 1 1 ! i ! El 1 UJ UJ U-l 1x1 UJ Ixl UJ UJ UJ UJ UJ UJ

uo C'-J IJO LlO

m roi lEi _1 1 iJJ E c^; iO ro iJi ro 5

CO iT, _! 1 El r- i£i iM El uo

CC ro CO rr iJi r- in ij? '£} r- iT-i

r i 'Oil Aj r- ro iTi E 'Hi |A

J '^r E rr-- ro .—4 iTi r-- 1.0 ro OJ Ei E 1 ro ro ro ro ro ro ro AJ 1 Ci E El E Ei El El E E E El E El

•a: uu

ct: X

LUo

CY.

1x1

IJJ i El El E E El Ei El E' El El El E El E E El E El El El El El El El El E ^ i UJ LU UJ UJ UJ LU UJ UJ l£! UJ LiJ i El 1 ij-i iJi r-- 03 UO El i£i r-- :r 1 LTi A.J CJ ro AJ i£i ro OJ Ijl 2: 1 1 _J i 03 iji 03 r--- IV IV r-- '.j3 IjO ro Ijl Ql 1 1 _1 1 cri El iT: LO El !-0 ro Ei m 03 r- —1 1 ^- Gi IO UO i£i rv CO iTi Ijl iTi iTi CO 1 03 r-- LTi ro iTi IV IP ro iTi IV uo

i.£i i.£i i.£i i.£i i£i in in U"i uo \r> t St

r^- i-'- r^- r-- IV r^- r-- r- IV rEi E Ei Ei Ei Ei Ei E El Ei Ei Ei Ei

U 1 El E A-J i.O

m AJ i£i E Ij-i El i£i

X i g

El E E El El AJ OJ ro ro

LL Ti 03 r^- i£i LTi ro OJ El IJl 03 1 El iJi iTi iji iTi iTi ijl iji iJi iTi iTi 03 03

_J

_J 1 El E E iS E El E El El E E El

>;K X- J-S

K >t El El E E E E E E E- E El E Si

S) UO E 1.0 El in El in Ci LTJ Ei in El

El E iM ro ro >S> \n i£i

100
IS E E E E E E E E —\ E E

CD El E E E E E E E E E E E

2: i UJ

u LU UJ LU Lu

U LU LU 1 : 

LU CC 1 r--- r-- ^ iJl iJi UT CO r- '£! IS ! _j i E CO E U": iTi r-- E '£•. CO _1 i l6 ro OJ :Ti U" \r W) U 1 Lr:: ^B S

Lii 1 LTi IJ-1 in OD ro CD IT| CO ! Ljj r 1 liJ E '£! OJ ro E U"i U. 1 1 r-.j [•- [:2

<:: E iT. p-i E 1 r-v- r- r-- r- r - i-.D '.n •£> >X i 1 i- > i a: _j 1 1 UJ Ei E E E E E E E E E E E E

CO

LU ] C'nJ P.J "si fg rg P-.i O.J p-j P.J P.J rg E E E E E E E E E E E E E

z: 1 1 1 1 1 1 1 i 1 1 1 ! 1 i ! 1 ! LU LU LU LU LU LU LU LU LU LU LU LU LU

COm r\- CO CO E r-n _i 1 E LTi OJ O-J U'l E L;0

i.ri E {-'} U"i r-w 03 CO r-- >£'

'Xi r- E

'4

IT. IJ-I LI iTi a-. !

in 1 CO i7-, CM XT Ln r- E OJ LD I'- E

r- ^ E >£' eg Oj Ul r-- ro E E i E CO CO r-- r-w 'X' '•Xi i.n l^^ Lr:i U"! :

'-'1 ro ro fO fO ro ro ro ro rn ro ro ro E E E E E E E E E E E E E

LJJ 1-

UJ

LU ! E E E E E E E E E E E E E

1—' 1 E E E E E E E E E E E E E ^ i 1 H i LU ixl LU LU UJ LU LU LU UJ LU LU 1 i_i 1 ^ UO 0-J CO CO i-Xi iJi E Oj CO w IT. •X 1 l.£: iJi Oj iJ-! iTl E U"i I-O JZ 1 1 _J 1 ij; roi r-- iaJ ro 00 uo i.o in %r Qu ! 1 _J 1 l£i ^ i?J 00 r-w E ro ro

_i ! LO E Ul s UO IJI CO roi r-- bl

CO 1 1 r i CJ >Ti -sT iTl ?

IJ. i.O ro

U"

-g- 'T LO

\r LO 1 %

ro ro

^- E E E E E E E E E E E E 1 E E CO IX 0": CM iXi E y-i E !£

a 1 E E E E E i".i OJ ro ro

u_ 1 E iJi r? i.£i ITi ro i?J E iji CO 1 E ijl iTi m iTl iJi IT IT iT Ti iT. CO CD -J

_i E E E E E E E E E E E E X 1 }^ 5« J-S J« >i d- 1 E E E E E E E E E E E c. 1 E LO E in E LO E E !jO E UO E o 1 E E Cj CJ UO v.-

101
I1 C'J i3J i?j ^ i T T T T T j 1 UJ LU UJ UJ UJ UJ

LT. ._J 1 Oj ro r>- _J 1 OJ UJ

r--m !.£' iTi '-Ci iTi

iSD 1 K. O-J

r-.J 1 I." i CJ C\i

1.

M O' P J OJ O'J OJ Ci 1 iS1

'X'i X! 1 1 1x1 1 UJ 1 UJ UJ UJ UJ UJ Uj iXi LTi rf

Ki U"j f- Oj iTi IX' Ki fO r- ro

I'- sT OJ ro 'X'

C'-JG 1 i.£i iXi r--

o.l o;i UT ro OJ OJ 01 O-.j OJ C-J CJ OJ OJ OJ

till iX' 'X' *Xf iX

uJ

'X' iXi 'X' <Xi Xi 'X' iXi iX' 'Xi Xi 1 'Xf 'Xf iXi '-i-l 'X' 'X' (Xi 'X' iXi i 1 1 1

UJ U_l UJ Ui UJ UJ UJ UJ UJ IJJ UJ UJ i r-o Oj 'Xi in r-- iTi OJ 'B ! _j , UJ 'Sj rCj iji Ci Ui r- 'ij in 1 -J 1 fXi CvJ CJ i.£i rt r-- iXi 1.0 1 Ln rn OJ ITi IV O-J (Xi 1 1 UJ i xf ro ro r-T ro roi r-o i 1 r->J \--- [T! ro o.l IJ'! IT! ! ~i i iX' dzi iX' X' 'X 1 iX"

LE 'X tXt 'X( iXi iXi 'Xt iXi rjD 1

UJ i 'X iXi iX 1X1 IS ijt.' iS iS IS tS i:J

1--! I 'X 1X1 iXi iX Xi 'Xi iS iS iX iS iXi IS iS o a 1 UJ SZ 1 ijj 1 u UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ I '£1 i£i OJ O'l r-- Ul iXi in ^^J lIj ! i :Ti iVi Ln fO Ijl \r r-j rn Ci

•—< J_ i 1 i 1 rn ^ OJ i£i rv rn in rn CO iji l£i IS n: 1- 1 1 ._1 1 1X1 {n r-- m IS IS IX! en Cj r-- i£i t— |V UJ i 1 1 Ul i£i ro iX iM U! i-D r-j iTi i.£i rn 01 1 r-- in ro QD l£i iTi r-- OJ IS

Oilm <X 1 1 -vr sT ro ro rn OJ OJ OJ OJ OJ

-<- 1 1 ro ro roi ro ro r^.i rn rn roi rn ro roi

m

U, |J_ li: 1 O O X) 1 1 'X' iX' Xi IS Xi iS iXi Xi iX (S IS IS >s

i:n 1 2: UJ 1 0 H ,i=i i 'O: z: 1 CO 0 'X 1 0 1 UJ 1 ai 1 a: 0- 1 i-i h-o 1 0 iXl iM '£' cn iM I-D XI in 13 1x1 <r 1 iXi iX> (Xi IS Xi IS Ci OJ O'J rn

'1 U- 1 IS tri ro rv- i.£i in 'sT rn C-i IS cn 00 

00 1 1 iXi iTi iji cn iTi iji ijl iji iTi 00 GO

O) 1

_J

_i

<x

Gj iXi IS IS IS

© IS (S iS IS iS <s

r^i UJ

03 1 ^-

ti^ 1 5-i j» J.? >z

K >; 1 iXl IX CD IS iS IS IS IS IS ixi IS IS 1 IS in 13 in Gi Ln in Ci in Ijj in IS OC

OJ OJ rn rn \ri in IXl |V

102
7Z \

i3D Ci El E El E Ei El Eli E1 L j 1 1 IJJ 1 IJJ 1 UJ 1 1x1 1 UJ 1 UJ 1 UJ ! 1 UJ 1 UJ 1 UJ UJ UJ 01 I ! rn iVi iJl r-i in i?l E 1 i _! i CO Q 13 r-- Ei S.I E LO El uo _J 1 1 _! ! '•JJ in '£1 El 'D i.£i IT, ^ ro 1 U 1 ll! I 1 >N-] lyi r>- OJ i i Ui r : ro in CO Ei <?-i i-JO co

Ll. ! ! ru IJl 'D r- ^ iTl rr, CO p- lO

\r 1 Ti i.Ti CO Oj 00 !-- r-- f- r-- I.J3 i£i CC .'^ 1 \ <j-i f.J O-.j n. vs :?.J r.i r-.i OJ 1?,! OJ i: j 1- > ! 1 El Q 13 El El El El El GO E E El E

UJ i! ro ro f '1 i-O ro ro i''Oi ro roi ro roi roi roi 1 El E El El E i30 El E El Oj E' El ej 1 1 1 1 "l 1 1 i 1 1 1 1 1 O 1 UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ

r- r-- r-j iTi uo iTi 0-J ~ OJ

_j 1 r-o OJ Iji iXi OJ r--. ro r-- E

_J i OJ iTi CO i.£i ro UJ El 0"-| 1.JD E E i.Jl'- ro ro i.£! OJ El OJ '•.0 OJ CJ U'.i z:' i El i

cc t'O Oj ro iTi IJO 0-

El CO 10 r- OJ iXi i£i lE UOi El

i-n Ln ro ro OJ OJ El

lOJ i \r.i uo in LlO uo IJ"1 IJO UO

m UO iri El El El E El E El El El E El E El

hi_l 1 Ul- 1— UJ i Ei Ei E E E E E E i\ 1 E E

z: El El E El E E CO El CO CD E E El

R o 1 1 Lus: 1 2: 1 UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ % 1 l_i ( E Oil LTi UO iJi O-J UO OJ Oj E ij- UJ El r>- E r-- ^ E 1

r---. ro

iTi ij-i Oj roi UL 1 1 i ro i£i Oj OJ ij:i iTi ro r-- OJ r-- i.£i 1— li; UJ El ! Oj Qj Oj 00 iTi iji |J1 E CJ c—

OJ 00

Li_l '-H 'H CO i i r 1 IT'! UJ r- i.£i UO ro OJ E OJ l?-j Lt Oj T C' El Ei E E E s E El E IE lT| 00

:z: iTi IJl u_ u_ a-: till'. Gj El El E E E El El El El IE E

IJO ^LU _

CI 1 El E O-J i.£i iTi O-l ijo El ij:i E '£i

'iX i Ei El El IE El El lOJ OJ ro rio u_ 1 El iTi Oj r^- iXi bO r-n O-j E IT) 00 1 E iJi Ui iTi iJi iJl iTi iTi iJi iJi IT-! 00 Oj

_j_i El El El El El El E El E i3j El E

•I 1 U >; >i 3;^ J' 3>i 5« 3S CE 1 El E El El Ei IE E El IE IE El lis IE 1 lE in El UO Ei u:i iS UO E UO El in E i E El 04 OJ roi roi \r iJO n i.£i

103
I 1"^ 1^

n Ui-' i_iJ ! 1 1 ! iS Q '3 El E I 1 1 O ! IJJ !i! UJ LU LU LU LU LU UJ LU UJ LU UJ

'T: U" LO Ln rn r-- IJl O-J 'Xi i 1 i _j 1 r_ r- in in r-- r- Ul LO r- i.JJ in w iM iTi i.£i r- ir; Wt ro p.! Q-J Li": r E' U 1 Qj 03 OD CO or f- r- 1" - r-- r- r>- r- |j3 i 1 1 1 Oj OD CO UJ OZi u:i rri ijO 03 03 03 1 ! 1 El 1 > 1 U'l iT, U 1 iTi Ti iTi iji iXi iTi U'l iJi 1 1 : 0-j 1 iTi ijl cr-i iTl iJl U 1 iJi iji iTi Ijl iTi

i2Zi i3J iS5 '3 '3 El El

_J

LU

LL

;r

x

a

u_

U3 \- h-

_lO

r) SI cn

UJ

QC

•a: UJ

>•

LJJ t—) X

IX 1- h- Oi. 1x1 u 1—4 •r- m

U-o o

iXi UJ

Q 1-

cnu

LU

Qi

Q.

UJ

Lu

El El E E El E El i^J E E El El

2: 1 O 1 LU LU LU LU LU UJ Ixi UJ LU LU LU Ui UJ

E' El E El Ei El E E E' E El

_J 1 tXl El IS E

El EE

E'El E

E'

El

El EEE

El E

r~H E'E E

_J 1 El

'El El E

El E El El El

El

El E E

LU 51 i 13 E El E E E El E E El E

PnJ CD El El El E E El E E E E El ^ 1 i3 E E E' El El E El E El E

1J3

—1

LU E El E E E E E El El E E E E

a;EXu

LU

ai E El E E E

UJ 1 C-J 1 El E E E El El E 1^1 ijj El

UJ 1 1 1 LU IJ.1 LU LU LU UJ 1x1 Ix! UJ UJ LU LU IJJ ! O 1 El E El E E El E' El E El E E E El E El E E El 1.' J El E

2: 1 1 _j ; E E E El E El C'i E E E E E

or 1 1 _j 1 E E E E E E E E E El El E

ZD 1 E El E E El E E E E E E

03 1 1 XL 1 El El E E E E E El iV; E E

El E El El E El El E* El El El El E E rJ l.Xl |J1 iM 1X3 El iJ"i i-D E E E E El El E iM iM 13 m E iTi in l.Xl IJ3 I"i3 O-J El iJi 03 El cr-i iT» iJi iTi iTi iJi iTi iTi iTi iJl 03 03 E E E' E El El E E El E E E I >? 5.4 \" l ! E E S E E El E <£' E E' E E 1 E Ll3 E E ITJ E in E U" E U3 E

ut;

i__i 1 E E T—

01 I"i3 1^3 U3 LTi ij:i

104
1 1 i3Zi 1^1 is CD i T. i

GZi 1.^1 1^1

O 1 O 1 LU UJ LU UJ LU LU UJ UJ LU LU Ixl UJ UJ 1 ' ' 1 iT'i 'Xi rPi CO iT'i CT'i 1 .-J 1 Cn r-n Lil \<~) U3 {- LTj a-i i _J 1 C'J e-J CTl iTi iTi CCi O-J ' 't— ' iTi i3 ^ (V. LTi f-.J iTi iXi bO M El "•'f •J CO U 

o:;i Oj r-- 1 i2j 1 r- u? Til i-£i 'Xi Ti 1 1 rj 1

iTi ijl •Ti IT; iji iTi iT. iji

Q "Si! I31i i3

LU I• Gil IS? 1^1 El 1^ El El El El J

i^i i^i 1^ 

Gil E' tjli I'T'i El i^' Gi E' j —r t ~*i 1 LU LU UJ LU LU UJ UJ UJ LU Lu UI lU LU

Xi U") Xi iji rci iJi 'Xi xr ro "Ti LTi 1 1 LTi rci iXi l.£i OJ iXi ro LO IX in ro 1 ] J ] 'XI LTi Ei \j iTi ro f\_ Ij" j IT, ro

LU 1 ^ J Oj fv_ •Xi U'l Xt' LU •V" LO LTi \r 'rf TJ- ^

iTi iXi iTi iTi Ij 1 Ti iTi iji iTi iTi iTi 0"i i i7-. 'Ti iTi iTi iTi i'Ti iJi it! Ti iTi IT iji

a 1 U"i ili-i 1T1 iTi iTi iTi IJ 1 Ti iTl iTi Ti iT: P"! iTi (— 1^ 1 ^X. 1 LU . iS iVl El E iS iS i~- El « i ] t Lu

U- ^ 1 !3Z 1 i.M cn 1— 1 t— T. i , 1 o 1 LE ~i 1 11 U 1 CK Qi 1 UJ 1 iS iZZ' ijHi 13

Q I'S iS El El El iS El

'TZ 1 iXi iSI' G"i El iS ft il l 1 LU > 1 LU LU LU LlI Ixl LU UJ f-' LU LU UJ UJ LU UJ 0 1 ro C'-J i.£i El C^-j ro r-_ CJ CJ LU 1 ro ri.i iTj rri IX iAj r- —1 X 1 .-J 1 IT, Oil ihi •Xf rci CJ iji r- 'X'i n: 1- 1 S; ._! 1 CM El Ei ' IS lEi (— ii: LU 1 ^1 iJi iTl IT, iji iTl iJi iji ITl iTi 'Ti iTi IT, C^ LU 2: 1 0:1 iTi iT'i iTi iTl rr, iTl CTl a-i iTi iTi iTi iTi iJl CK CD (I 1 iTj iTi iTi IT, Ij'l iJ) iTl iTi IJ i iT

a-i iTl iTi iTi iTi Ti Ti iTl iTi IT iTi iTi iTi Ll. U. £ 1 O O Z5 1 iS iS 13 iS E El IS El El El

o:i i 2: LU 1 o 1- C 1 •- 'CC 2: 1 0:1 Q a 1 CJ 1 LU 11 ck; CL 1 0

I-r

"1 iS El iM xl- IX iJi iM 'Xi El IXi El i,_ri 1 c: IXI i3j IS ijj-i iri Ei CJ IXI ro r'o 1 IX Ui Cm 'Xi -sT iM iTi 1x1 IS iTi I'Ji iTi iTi CTl iTi iTi iTi iTl iJJ 0:1

<u j 1 _i

d iQ IS IS IS El IS El IS 1 a

J2 1 1 i_'i 1—

RE

>•> Ei iS IS IS IS El s Et IS E' iS IS

is in Ei UT iS in iS IJO iS in El in El

E' i>J ro ro LO \n

105
CD IS '33' 0 13 i3i 'X' 13 i3D i3D i3D 13 CD IS 13 13 13 S i (JJ UJ IjJ LU LU UJ (XI LU LU U_i LU U-i LU CO I'M CO iTi IT: 'JJ m li-i i-> m in >M % y"i OJ Ul ^

_J 0? Ln iTl 'D LO

'JJ m 'Ti r- 13 r- Ul

1 LU Ijl 'Ti 03 rn 03 0:1 |-'- r-- r-- r--

i t ! r>.J r-- r-- r-- f-- f'- f^- r-- r--

i iTi G'l iTl iTi U 1 iji 1J1 :X ! i cn iTl iTi iTi iTi iTl ;T( iTi Ul in "1 h-X 1 bj ijZi '2Z' 1X1 '3 c;i 13 13

131 1 1 '33 li.' 13 '3Z' 13 131 13 13 13 lA-l 13 13 '31' 13 *3i 13 1^1 13 13 •3

z: 1 1—3 i LU LU IXl LU LU IJJ IJJ LU LU LU LU LU LU

03 ^- 0 J Q r-- m iTi LO iXi ro

i3i 03 |j3 CJ i3 'X' i?J 13 K- iTi 03 h'l 03 1T1 r- iM 03 iTi !->

iTl -•1 03 C'-.J >?i iji Ij I iTl ro in

"5 r-- r>_ 13 03 03 13 r\_ 'Xi i.Xi Ul

r<3 <-^i 13 13^ m i-- W LTi Ki E 1 iTi Ul Ul iTi at 03 13 03 m IJJ IJJ 1 1

1

03

OS 1 03 03 03 03 03 03 03 03 03 03 03 CO 03

rj i 13 131 13 El 13 131 .13 13* 13 Ci (3 Gi 3

cc

LU

UJ

LU

i' '1 1 LU 1 13 13 13 <s 13 El El 13 El '3 El

C^i 1 13 13 13 13 13 3 El 13 13 13 i3 El El

UJ 1 i -i- 1 LU UJ UJ LU UJ LU UJ LU LU LU UJ UJ LU

1 0 1 fl ^- iM f'l iJl IS W r-i Ul LTi •I 1 iS r-- 13 to 13 m U3 r-- 03 03

i _j i iTl 03 ro 03 T'-j iM IS 03 O-J q; I 1 _j 1 O-J iSj 13 El u. Ul 03 03 Uj

Ln LTi Ul ITi irj LTi -t -nJ- \r 'vT ^

iji 1 iTi Ul Ul Ul Ul Ul Ul Ui Ul Ul U1 CTt Ul

iTl iTi Ui Ul Ul Ul Ul Ul Ul Ul Ul Ui Ul

Ul Ul Ul Ul Ul Ul Ul Ul Ul Ul Ul Ul Ul i3 13 13 El 13 13 13 13 13 El 13 El 13

r_) 1 13 13 iM ^1- 1X1 Ul OJ i.Xi El LO El Xi I 1 13 13 13 El 13 13 13 CJ rj M PI

U- 1 13 Ul iTi 1x1 Lfi hi 13 Ul 13

1 13 Ul Ul Ui U: Ui Ul Ul Ul Ul Ul 03 ijl _l

_J 13 13 iD El E 13 Ei El 13 13 El 13

<r 1 5.* 2* a J? ?4 en 1 El El 13 El iS IS iS IS IS 13 13 E E

1 iS in 13 m 13 ID El in 13 LO 13 LI iS

ct; 0 1 CO El rj ro ro LO IT; 1X1

106
<X '~T. g:

(=) f=t

Cj

L!_ »

_1

p

IS) Ul ^ O LUX

a-: I- t- ii: Ul

U- IJ- o a

2! IJJ D h- — !

U")

O

(_i LU

Qi

D_

LU

0) ]

i3 1^' 13 1X1 1X1 1X1 iXi 1^1 iX' I iS lii 'X' 12^1 1X1 :Xi iXi iX' (Xi iXi IXI 1 UJ LU LU IJJ LU LU LU LU tu UJ LU UJ LU 1 ] ' ' . 1 vl IJJ 0 ij- r>- FOi I'Oi ' 1 Ll~i i.£i Ijj r - ro LT.i (Xi LT' Oj 1 1 Ij I in iXi Oj UJ Ul iX' rj C'-J CJ )Xi r- 1 r<.t ro K. r- rj Oj CJ vr ro 1 in i£i r-w iXi co iXi iX, 1X1 ai Oj Oj r-- !£ 1 I'D IJJ '.£1 CJ iS CO i£i \r CJ (Xi Oj i.£) 1 1 S i in xr \r ro rn ro ro CJ CJ 1 1 CJ 1 r- r- r-- r-- r-- r- r-- r^ r- f.. r- 1 1 1 i ~" i

i2D ci 13:! (D IX. iXi GIi (XI iXi t 1 1

UJ El 'Xi Cj 1X1 (Xi iX iX' 1^' u-1 1 ! ^. 1 CO ijZi IX' 'Xi © Q IX' iX' I'D 1 I O 1 _LI LU ijj ijj LU Ijj UJ LU LU LU LU LU UJ 1 01 OJ (<-l i£i r^ roi XT r-- ; Ul IJJ Ul 1x1 CD U~i Q Ln iXi ^ 1 ! ! 1 OJ C'-J O-J tTJ on "vT iX) QJ iX' C-J p- LTi iTi iM i£i iXi ro l£i IX' ro i-U 1X1 1 iX' ij'i ll! iXi f'- i.£i U"i in \r CJ 1 ^ Ki ro ro Ki !••'> ro ro roi ro 1 i ^ 1 iJi Ul Xi iXi 1X1 U 1 1X1 1X1 1X1 iji G 1 iT, iTi Ul iTi iji iXi 1X1 IX iXi 1X1 iXi iXi Xi ! 13 i3Ii i3 'Xi iXi 1X1 iXi IX- iX» 1

lU

1' 1 1 LU 1 iXi ID iXi

Q iXi iXi iXi iXi iXi iXi iX iXi . 1 1X1 iXi iX' 'X' IX) 1X1 iX' iX" IX'

LU 1 1 2: 1 LU Ijj LU LU LU tu LU LU UJ LU lU Ijj U-i 1 i_i i rn CJ Xi ro ro Ul Ul -J CJ LTi (£i ^r iX roi ro Xi 1:1.1 CJ i _) 1 CJ r-- CJ \\- Ci i.£i 1X1 i-£i U1 ^ i 1 _l 1 r^- LT) CJ IX, CO IJJ —1 j LO LO 1x1 LT) in 'TJ- ^ 'J- ro ro

0"; 1 iZi iTi Oj 03 iTi iXi 1:6 Oj CO Oj ro iTi CD

Ul iXl iXi 1X1 Ul iXi Ul U> Ul U'l Ul Ui Ul

iXi 'Xi Ul Ul Ul Ul U) iXi Ui Ul Ul Ul

IX X' iX' iX 'Xi 1X1 1X1 iX 1X1 iX •x iXi

IS iX CJ 'D Ul CJ ID IX LTi iX l£)

iXi 13 iD IX XI 13 CD CJ CJ ro

iXi Ul CD r\- <-0 ID "sJ' CJ iXi iTl CO

<s iXl Ul •'^ Ul Ul Ul Ul Ul iX Ul OD CO 0 iX IX iX' iS 1X1 iB iXi iX IX s;

j,-> >-* 3< x> 5^ >s dp iD iS iXi IS iX (S IX Ci IS (S

iX LH IS LTi Ln 'X ID (S Ln iX' LO iS

IX 15 CJ CJ

M ro 'vT in Ul *Xi

1U7
!111 1 1 i 1 1 1 1 i 13 i3 13 13 13 13 i3 13 13 13 13 0:. 1 i 1 13 13 iS 13 13 13 13 13 '3 13 IS 13 1 I 1 i 1 1 i o LU UJ UJ Uj LU LU UJ LU LU LU UJ LU 13 I ' i ' '—

to '-9 i.JD 1-3

U .1 13 O'J '3 f-- 1 1 1 —!

LD Ij''! Oil OJ Oj i3 LfTi iJD r^- 1 1 i _! i

CO CO LlO OJ 13 iJi ro r- O'J Oj 1 1 1 iJi ro i.j;! 1.3 Lll OJ 13 iS 13 rn <", 1 1 r ro iji lOJ CO 13 LTi '£> Ul 13 1 i 1 Ijl 'X! OJ iT. !-- in OJ 13 r- 13 OJ '3 1 C-i OJ O.J OJ 13 13 13 3 1 i 1 Ci - i.n 1.0 '.n to '3 3 13 13 '.£1 13 JD 13 i i1 i 1 1 1 1 1 1 1 1 ! 1 i 1 1

13 13 13 13 13 13 13 13' 13 13 13 13 i3 i 11j111 i 1 1 1 i 1 1 i ; I 1 i 13 3 13 13 13 13 <3 13 13 13 3 15 13 1 1 1 1 '3 13 13 13 13 13 13 13 13 13 13 3 13 i 1 1 1 2: j 1 j 1 O ! LU LU IJ^I LU LU LU UJ LU LU LU LU UJ U-! ! CO ! i ! '^1 ' CO 13 r-- ro 3 r-- OJ i 1 ! i 1 Jjt'' J

i-j_i 10' ro r*- roi OJ -irt- r^- OJ r-- •J ! _l ! _l 1 ipi O-.J 0.; iTi ^ OD CO LH LU ! 1 { '—' 1 iJi iTi 00 r-- 1.3 ro ^ iTi i'- Ln ro 1 j i UJ 1 LO ro OJ t—1 3 iji Oj r-- '3 •sr ro OJ •—1 I ! f\i ! 1J1 iTi iTl IJl 00 Oj ijj CO CO Oj Oj on i 1 —1 i CO OD CO on Oj Gj GO Oj CO CO Oj CO CO i cr ' X ! 1- 1=- 1 ! 01 11

Ijl iJl iTi Ijl Ci iTi iJi iTi iJi Ul iji 1

•a:

_ 1 1 LU 1 13 13 :3 Cvi 13 13 13 13 3 13 i3 13 i ft 1—^ i ( 1 1 ' 1 Ol 'O; ' i u. 1 O ! i ! Lj_ 1 1 1 x 1 LO ! ! CO 1— i I -7- 1 I ^ i ^ O 1 1p 3 r 1 CO i >-< 1 1 LU •• 1 U 1 1 UL Qi i LlI 1 i 3 13 13 13 13 13 13 13 13 Ci 3 13 1 a ! 1 3 13 13 13 13 3 13 13 I3i 13 13 13 i a LU ! UJ >- 1 ^ 1 i 2: 1 UJ UJ iX! Ll! UJ IJJ UJ iU LU UJ l±j UJ LU i S'- i O 1 i.£i roi 13 13 CO O-i -.—i

no 13 «3 1.0 1 U-l 1 a: 1 1 I—' ] r-- r-- 13 13 13 '£1 Oj LO r-- uo r- UO 1 — X i :r i 1 _I ! 00 1.JJ Oj iJ'i iji 13 Oj r-- 1 q; !- 1 111 i 1 _J 1 ro 13 r- LOi oj iTl 13 ro 3 r-- -—

00 ! ~i 1 1 ro ro ro OJ OJ OJ OJ 13 ! Ijj 1 ! r i- r-- ^_ r-- r- r^ i._ r- r- f'- r-- 1 Ctl i2j -X i iT, ij-i iXi IT: iji iji iTi lT| iJi iTi 1 X 1 i 1 i iXf ij'i 0-, iTl IJt iji ij-i iji iTl iXi iji 0"! IJi 1 Ll U. Ill 1 1 1 O O D 1 i 1 13 13 iS 13 13 13 iS 13 13 13 Ci 13 13 1 CO 1 1 1 z: UJ 1 O 1- « 1 1 1 a 2: 1 1 i CO •! ! 1 1 1—1 ; 1 _. — 1 O 1 LU 1 1 K 1 D. 1 i a j it _ J •3 1?-J '3 IJ"! OJ i.i.1 i_^i U 1 UJ 1-iJ 1 I 1 -x © i3 iTl 13 13 13 OJ i"^j r'~i ro ! 1 ^ 13 iTi o;i in roi OJ 3 CO 1 1 d ij-i iTi iji i7'i IT) iTi 13 iXi Ijl iji 03 1

O) j ! ^

i3 i3 3 13 3 di 13 3 i3 '3 iS 1 j 1 a1 UJ Ta 1 Lt: 11111 LU i 1- 1 'O: V: n >i it Ji 3-5 >i 1 1 oc 15 i3 13 13 3 13 15 13 13 3 13 3 1 1 § Ln 13 IT. 13 ITi 13 Ln 13 ir.i 13 13 1 1 li: 1 Q 3 i3 C'sl OJ ro ro \r in in 0 1 1 CiL 1 di. 1 LU 111 108
CO

_J

UJ

*—

u_

<z

DiO

LL

-T- U'J t-

--J —

il

0"; LU

q;

ji Pi

UJ

LU

(- Q: ijj LU

<X in

LL. o

iXJ

ijj o 1-a I

U1

LUa. 1

iji.i Ci Ijj o iXl iX' iXi iX- iXi 1 1 13 Q El ei Ci G' iX' 'Xi iX' g:i i O i UJ UJ LU LU LU LU LU LU UJ ijj IJJ LU LlI I 1—1 1 ^- ilili r-- Qj r\- iT, ro CiJ 1 1 r-- 1. !"! in CJ iTi Qj iji OJ ! - '-£i ! _J ! r'v 03 r<" Oi rv. i-£i iX' Ij'! "^i 1 r LO 0'' O-J 1 r; r- '£i LT.i 1." J r-- ] L'J g;: Lll is iXi ':p fj iXi "xi" r-_ 1 O.I r-- in CI Ijl O-.i iTi ri5"i i >j -J r<-i ro ro ro OJ OJ rj i?J 1 C -i 1 Li"! LTi LTi Ln ITi LTI U .1 U~i LTi l!" LTi LTi 1 fsi ! El Q IX' IS Gi Ci IS Q iS d iXi 1 1 T: 1 C lu UJJ

in

U"i

iXi

iXi

iTi in

iXi

r-^i

ijCi

CO

iXi IX

iji-i OJ

inC3

iXI

iXi

C iXi

LU

i>i h-Wy

'Xi Oj

Ixl

iXi

iXi

IJl

iXi

iXi

I"!': rn

0-J

LU

iTi CJ

-3-

iTi

UJ

UJ i 1 1 13 IX iXi 'Xi iX iX iXi iX iXi iX 1 1 iX' iX 'X' 'Xi iX iX iXi iX iX iXi iX iX UJ 1 1 1 1 -x. \ LU Ul LU LU UJ LU IXI LU u UJ Ixl LlI UJ 1 O 1 r-- iXi i.ri IX) l.£l I'N- Ul Ul Ul i?J 0:1 •X 1 1 —' i r- IXi iXi LO iX Ul l.-^J U'l 'Ul ro 1 -J i Oj ro LT' in 'Xi LO r-"' iX S i 1 -_J 1 h- iX 'Xi i.^j 'JJ IX' I.X1 '."^J ZZ' 1 1 1 r-T OJ OJ r-.'i iX' Ul

0"! i 1 IT 1 'X: 'Xi i.n I.n i.ii i.£i iXi l£i i.£i 'Xi i.Xi 'X' 1 1 Oi ij. 'Ti ij; Ul Ul iTi U1 Ul Ul Ul

iji iTi Ul lT| ij) Ul Ul Ul Ul Ul Ul Ul Ul 1 1 1 1 GJ iXi iXi iX iXi iX iX iX' iX' 'X iX 1 CJ 1 IS 1X1 OJ I'J ITI CJ '.Xi iX IXj IX' i.£i 1 CD iXi (Ti iXi 1^1 iXi iX OJ '"..' ro rn 1 \Z 1 0 Ul rri IX U"i ^i" M 01 'X Ul ^ 1 1 _l 1 0 Ul Ijl iTi Ul Ul Ul Ul iTi iTi iTl 0:1 in

<u 1 1 _J iX IX iXi IX iX IX iXi iX iX iX iX

3-C >^ >i 5-2 i>i x' iXi IS) 1X1 iX 'i ' iX iX 1-. ; iX LP in IX in iX Ul iX Ul IX

IX iX iM l^J rri 1+ L"i '.X109
! CD CD CD iXi El E) 1 O CD i3 'X' 13 Cili Ci El El

2: 1 O 1 UJ LiJ UJ UJ UJ UJ LU UJ UJ UJ UJ UJ UJ

CTt u~ rj in iXi I"'

J p..j U~i _j 1 CD ro LO ro LI LTi ^

_i 1 ^ u: iS ai \r GSIi ij"i '.'J iTi El CO r- in OJ CD IJ 1 E ; fvi in r-.- ro IJ1 Cvi in ij:i IS o:^ in ro in ro on 'I'J r^i iS 1 iTi iTi 0:5 CO ^- 1--- r-- 'X3 ij:i in

rvj 1 ro ro ro ro ro ro ro ro ro ri-i Csj 1 Gi CD CD <S Ci El iX' El El 1 E El E E E E E El E E E El E 11 CD E E E E E E E El E E w!i E I 0 UJ LU UJ UJ LU LU UJ LU UJ LU UJ UJ LU LO I LO Csl OJ |>J r- ITi i?-J E C'-J Ul G 1 1 in ^ M- ro iJD iTi iJi E ro

_J 1 ! I CTi IM f-i 'St UD -J- Oj 0:1 CJ ro iTi LU 1 1—-,

CM 1X1 iTi ro ij3 r^- r- r- i-Xi UJ OCi LO OJ E ^

Oj LO i>j iXi ;o ] 1 ] j"\ ( I 0"J '?"J '-J iT'i CTi > 1 r\- r- r-v. r>- V- IV •jli 'Xi 1.0 <X '.T 1 0'! cr-i iji CTi iTl CTi CT'i iT] lj-l iji ilT iTi iTi 1 C£ 1 w E El E E E E E E E E» E E E 0 Q 1 —J X 1 '—

Cic ' X ! u. 0 1 U. ^ 1 f- 1 cn t- ! i— X 1 — 1 — S ' UJ

_J to 1 UJ • 1

I' > K li' ! UJ E E E E E E El E E E X 1 E E E E is E E E El E El E E

ft UJ 1 y > UJ ^ i UJ LU LLi LU UJ UJ UJ UJ LU UJ LU UJ UJ 0 1 \r CVJ IV ro E fO fVJ lAl CD OJ r- [u 1 CP iTl en 133 IV in i-£i iJi m iTl —^ 3: 1 z: -J 1 iji E E iJl r^ E r\_ El iTl li) CO OL f- 1 _J 1 iTi ro iXi iD IV iji in 03 iT( 1— Ci UJ 1 1 E iTl U\ CD |V i-D 'Xi ITi ro OJ uj-r 1 x: 1 ro iM Oi r>j IM iM CJ iM O-J OJ CM Di 12 1 iJi CTi iTi 1T1 cri iTi iPi iji iJi iTi CTi 0"!

CT) iTi 1X1 iTi G") cn iTi iTi iJi ij-| iTi iTi u_ U- 1 0 0 ri 1 E E E E E E E E E El E E E

cn 1 z: UJ 1 0 F Q 1 -1 <I Z ! LO 0 <I 1 »—t 1 U 1 Id 1 a: 1 12; Ci- 1 0

I-0 El E rvi UD ij-i Oi l£i E LO E IJ3

,7- E E E E E E E -.—

OJ ro ro

CT) 1 iZ El cn i]0 |N- 1.0 in ro rvj E CO E in iTi iTl iTl cn iTi iTi iTi (Ti iTt 03 Oj

Table

_!<ra

LU E E E E E E E 0 0 E E I 1 w K K }^ J.* }.? 3-:-: 11: 1 S) IS IS ID E E JS E E E E E 1 CD in E in IS in CD in E in E IT) E

Cfc 0 1 0 E OJ OJ ro ro in in 'XI

110
I I

QJ

LU_lO

bJ

LUr

i3j 'SI' El 0

IS CD •ID Gi i2 s I'iZi iXi ijTi 7- t 0 1 LU UJ LU LU LU IJJ LU LU u IJJ IJj UJ IJJ

LTi

Q Oj (Ji L'l ro

_j 1 rv LT' is LTi JJ CO iXi i3C- i.n _j 1 f^- <£! iM iJJ rn i£i 'X' LO

ill c 01' cr, U'l 'Xi IX •>r

ill Oj iji CZi r-'i ro

rj C'l iTi Oj rv 'Xi U". 5- r-:- CD iTi Ul G'l 1^1 iT'^ 01 Ij 1 iTi u 1J1 UJ ID Oj Oj IJJ lii IJJ

LE

'3Z' iS Si iX'

'ZD 'ID G? iS? Q iS C' 13 El ':lj El El Ei 0 ! LU LU LU LU LU ijj LU Lu LU IJJ 1.1 i Uj

•Xl \Si 0:: ro Lfi ro IT) r-- _l i 'Xl ro c-\ CO ro ro'- iji 'Xl ro

-t r- ro r'-o \r 'X: '^j 10

ro 0"i IJl IX ro 0 r-_ U~' 1 CO ij" CTi r^- LT.- E' IJJ .D •^

ITi ro i>j I—(

i3D OJ r-- 'Xl LT) I?-! El 0 1 r-<". ro ro ro fO ro ro r-o

C-i 1 El iZL- Gi E' El E El

u

LU

El

El

LUro

ro

r^-

iji

i3 El

Q E

'5 El E' El

LU

r-- iTi

LU

fl

LT;

Ul

ro

rj- iji

LU

rv

Ulm

rio rCTi

LU

ro

Ln

Ul

ro

ro

LU

'Xi in

rj

r-io rUi

ijj

r-CJ

(Xl

lu

ro

i.X

LTi

r-- in

i"j IiTi E

L'J

I.X

rvUl

LU

LHUl

rv

Ul

U! UJ

El

u.

IV

Ui E' E' El E' El

UJ

Ul

1X1 1 u 1 IS El O-J 'X' Oj •Xl '.L.I LO El 'X 1 iS El f ' i El El El Osi rn ro ^ 1 1 LL i IP iTl Oj rv <Xi ITi ro O-J Ul 00 ^ i 1 _j 1 E iTi Ul U1 Ul Ul Ul iTi Ul Ul Ul Oj CO

(U I 1 _i El iS 0 E iS 0 i3D E El El El El

cr . 1 ->i >t >i i E E 'k' E El 1V..1 El E iTl El El i 13 ITi E ir:i E El Ln E LO El LTi 'X' IX0 1 E El 0-1 rj ri-^ ['J \r lj~ h' '0

111
3 El iS Gi Gi Gi iSi Gi i

CD o CD G) GI GI Gi Gi

LU 1 • ;UJ 1x1 IXl LU LU LU LU LU LU tu UJ

!Sl ] IT' n'l 1>.J CJ IXi LTi OJ Q 1 ,J ! 01 LO r-- hi Gi !'-) CTi _J 1 .J 1 m m in ro ij-i r-- <TJ '.£1 ^

LU i KD fji 'S> Ln u:i i ijj FT! 03 LO Ln ro iTi Lfi GI Ll 1 M iJl LO Gi o:i 'X' y- 1 1 i LD >j-j rt- \r ro ro <r i ! CO CO OJ Oj iXi on Oj Oj o:i iXi to

rjC 1 1 C3 CCi Gi Gi iSi iS C3

0^

IJJ 1 i3j1 1

iGj1

iGl1 GI1 Gi1ITI1 Gi Gi

Q iGi Gi

Ci 1 LU LU LU LU LU U-l LU 1 LU 1 UJ 1 LU 1 LU 1 LU 1 LU

1.0 CO 'Ti r^ IX' '£' ij; *—1

'£1 IS ro '£) r>- r:i

m iTi .\r r». Gi iTr i£l i£i fO Gi Oj ITi Lr.i ro LTi Ln Oj 3; OJ \.' iTl ct OJ

t— 1 iTi ro oil ro Oj i.£i OJ i.£i ro

in iX r-o in i£i Oj en r^i Ln

Q 1 ro i?J i-j iji G'l r- t£i U3 LTi fv 1 Ul iTi CTi iXi cr, Oj Oj ijj Oj Dj 00 f .1 1 Gi Gi Gi Gi Gi GD iGi Gi Gi Gi

•x

LU

li.' I

1-1 a;

EC Gi Gi IS Gi Gi

GG iS Gj Gi CO

1*-^ i Gi

G Gi i3j Gi

G GiG Gi Gj GiG

yj 1 1 z; 1 LU LU LU LU LU LU LU LU lU LU LU LU UJ ^ i ! O 1 ro r<':i Oj Oj OJ 00 iTi rv- ro ".£1 CTl <Jl ir;i Ln 5^ El r-j ! _l i ro ro Oj Oj i3j CTl i:j n"i IV iXi

IJR 1 _J 1 r- r-- 'D ir.i Oj LTi

G rviI3 i£i OJ Oj G Ln r-- 03 fO Oj

CO 1 1 IZ 1 CTl Oj Qj r\- ^£| IXl in Ln r<j lO in if) Ln in in in in LTi in in in

Ijl iji <Ti ij"i <j\ iji iTi >T) 0"! iTi G G Gi iS GI IS Gi G Gi g;i Gi

G

CJ 1 G Gi OJ i£) iji OJ i.£) Gi LTi Gi LD

J- 1 G

G

m

GGGG CJ OJ ro r-T

|J_ 1 G iTi Oj '£ in ro

G iTim 1 G iTi iTI ij-i CTl cn OD 03

_i

G©

G G) G)G ISGG

G

^• ^^

3^* }« >5

GQ

G

G

GG

G IS 'S3

GG

G

G

G in Gi in

G inG LOG in

G in

G

GG OJ Ol ro ro in in 'XI

112
'SI' CD liJ Gi G'J Gi Gi Gi G' i-i G'

i_i 1 UJ LU LlI LU LLI UJ LU UJ LM LU IJJ IJJ LU CO 1 r-j Li"! ro W •J

('

! !^ 1 _ J 1 'X) Gi t :Ti Ul LO ij". i'3 _l 1 .-J ! iTi r_ IJ3 IT. h- Qj i3 LU I 0": Ln '.1.1 ir:i ro ri"t in '.J i.£i ro iS

i IJJ ijj rr iTl 03 rn rv in Ul ro

Li_ 1 ! r-' j iJJ iJi

1 r\- '£i i.£i in iri Ln \r \t

1 Ul UT b'J in Ln LT' LTi LO IT' Ij'j LH in in <X 1 1 UJ i3 Gi Gi I'D Ci iUTi iS

^ 1 Gi 13 G' IS G' iS IS iS' iSi iSi

1 j 1 1 1 1 1 1 1 1 LU LU LU LU UJ LU UJ UJ UJ UJ ixi UJ UJ

Ln LQ ij:i ro Ul I-'- O'i •sT '£' o:i r- f.- _j ' C!i ro 1 - Ij I Ui Oj ro ro Ul Ul

! 1 rj ro Ln iSi Tr CD r-j co ro

CT' iTp ro OJ in iT-i Oj IX! 'Xi 'Xi jj r- LTi OJ Ul iXi UJ U-1 rs- in ro

r--i Ul |.n ^^ rj IS' r-'- in ro u- Gi I r-": ro {•O nj i.M i?.j OJ ijii' C'J 1 CJ OS ni OJ 1>J lAi OJ OJ OJ

1>.J i iri E' IS 'Si iSi iSi iS IS

iLJ 1 LU 1 iS IS S! 'S iS iS IS 'Si 'S iS iSi iS

tP-, 1 iS IS iS iS iS 'S S IS iS iS

LU 1 i 2^ 1 LU LU LU LU LU UJ UJ LU UJ UJ LU UJ LU

1 O i iTi OD m r- ro Oj IS Ul roi IX' Ul

•Cl 1 iM CO (M \r iS r^- Ul OJ i.n '£1 IS

1 1 -J 1 sT CC' r- Ul in 'ii 1 -

r-- r- Oj 'Xi

ii:: 1 1 -J 1 iXi U", iS ro in in ro IS r>- 03 03 rn

1 1 iXi in r- ro Ul LO IS LiO iS LTi iS

ij-j 1 •5- IS 03 r^ LO ro S 03 r^- ro ro ro ro ro ro OJ OJ

ijQ CO 03 Oj Ijj CO CO 03 iXi iXi s IS IS IS iS iS iS 'S' iS IS IS iS iS

( 1 1 IS (O <M I.D Ul '.J3 IS LO 03 'Xi x 1 i3 13 '3 IXI IS 13 OJ ro ro U. 1 13 Ul 03 r- |j3 LTi ro OJ iS Ul ro

1 13 Ul Ul Ui Ul Ul U) Ul Ul Ul iTl IS 03 _J

_J IS IS 13 13 iS 13 13 13 13 i3 iS Q

X 1 <t'Z ^' M X: >< 5.<- OC i 13 13 'S IS IS 13 3 13 IS s i3 13

1 IS U") 13 Ul 13 in 13 in 13 in IS in El o 1 '3 fS 01 ro ro uo in

113
CO

_1

Ul

U-

>-

a:

i~ ^

cc

cm -x o

to ICO

UJ

Qi 111

!.JU

J

X Lt: 01 I— LU

!i: Qj

X x<X

U. U_ iDi O O I— 1— ~i UJ LU CO 2: LU UJ LU O H U- iii « —' I- I- T. CO Q CO UT X *—I u

LU

03

£1

LU

r.j

LU i

:X

2:[V

~iCO

13 El El E El E. E E E lE E

-' ' LU LU LU LU UJ LU UJ UJ UJ LU LU LU UJ

13 El El El iTi El E E E E E El

_i i C; tTi ;T! El El E E E E E E E iZi _i 1 E E. E El E El iij E E El El

El El E El E E E E El E E El

r i E. El

d El E E El E E E E

^j- i El iji.- E E E E E E El E El Q El g El E E E E E E E E El

El E E El E E El E E E E El E E E E IE E E E E E E El E i LU LU loJ LU !JJ LU LU LU 1x1 LU LU LU UJ 1 El E' E lE li.^ El E E E E E E Ij^l ! El E E E E r"i E E E E E iTi ! E El E i E E E E lE El E E El 1 E 1— E E lE C"i El E El E E E E i El El E 1~! E E E El El -iTi E E iE i E |V. El El E E E E IE E E E El i E E E E El El E El li.' E E E El 1 E E E E E E E E E E E' E El ! E El El E El El E E E E E E 1 UJ LU LU UJ UJ LU LU U! L! LJ UJ UJ UJ ! i_Ii 1 E E E iTi El E E E E E 1—1 E E. i E E E E E E E rri E E E iT, E 1 _j i E E E E E E E E E ~\ E E E ! _j 1 El E E El E E E El E E E E E E E El El E E El El E E Cv :s 1 E E El E E E El El El E E E E 1 El E E E E E E El E E E E El 1 E E E E E E E El El E E E El 1

i_i \-r

'1 1 E i.£! r-- ri"! i>J 10 0:1 CO X i E E E i?-.l ro U .1 r--

"3- u. 1 %

:§

iTl i.£i E 0:1 I-Jl! ro IT, Ul , ijl iji iTi n;i on 03 cc OJ r»- _J E E El El E E El E E E E E

LU

Lu1-

o: 1 3f 5? J-i 5;; }« J? ?e

ct; 1 E El E El E m IE E) E El E El 1 E IT' E j-i El in E L"! E til El LO El

q;1 1 1 E. E OJ l?..l I'll ro iJ" i.D q;

Ct

Ui

114
lJ

UJ

LL -

y- CL 'I H

ft

g o

Ui

UI

Ui

II; ! 3

!£ . z z: U. iL fiL cj a I- I- ;d

IJJ UJ iJ-i 2: loj I.U Lu

1.0

a o"j CO '3; o

Ln

JO

UJ

_. [ _

AJ

\Z1 1 CD 1 IJJ L).l IJJ Ijj 1 1 1 IjJ Ijj UJ 1J

J L.J 1 1 I 1^ iT"i 'ID cl CD E 1:;'; 1 ! tX' 1.0.1 tlD 1^ GD 1 1 'ZD I§ IS IB St E E 'Lj T. 1 1311 E E E CD

in IS El E E E

CD 1 13 13 iS Tj E E i

cv; 1

•S3

d El E E E E El IE E E E E E E E E E CJ

O ! UJ UJ IXJ Ui IJJ U.I L'J UJ Ui UJ UJ UJ UJ E E E E E E E E E E E E

_J i E IS E E E E IE E E E :i E E E E E El E E E E E E E E IE E E E E E E E E E E r 1 g g E E E i E § E E E E E E E IE El E lE E E E E E E 1 E E IE E E E E E E E E c:i

i'j:i

LU E E IE E E E E E E E E E E

1^

.I

a;o

Ct; UJ

IJJ i UA 1 E lE E El El E El E E E E g:i E ^ I 1 1 UJ UJ UJ UJ U_i UJ U-i UJ UJ UJ UJ UJ UJ 1 a ! E E E CO E E El E E IS E E E S ' E Ci E E E E E E E E iS E IS I _j 1 E El E iS E E (~t E § E E Pa E

ii; 1 1 _i 1 El El E E E IS iS E E E ifi E E E E E iS IS E E E E E E

ixi 1 1 71 1 E El lE E E E E E E E E E E IS E E E iI3 E E g E E E E E Ei E E E El E E E E E i::i u 1 E 'Xi iri r-n 03 1/:. in r-. <! 1 IS E iS l".i ro l:i h- ti- i- G3

U- i E o:i <D i.M E 03 i.£i iji 03 1 E iji ij"1 iji iTi III iX CO 03 CO 03 i^- rv. _i E E E E E E iS E E IS IS

}4 j; •>-: E E E E E E E E E E E r.-i E

E. iTi E Lfi E ir.i E ITi E LI E |j"i CD

iS E iM i.'->i ro ri'i -1- in

115
O'l _i

LU

U- -•

jh- 

Om

h- z:

Uj •. 2$

LU

hU

ii; Qj .Hi 2: 2: 2: 0 13 h- 1— =1 LU iJj IT) z UJ m u

01Q ul 01 '1.

PREC: a

Ln i i

i3J 1^1 IX' Li-I E El E El El E E ! ^ i f 1 1 LLl LU LU LU LU UJ LU UJ LLl LU LiJ UJ LU i IS E E E E E E El E E E 1 .-J 1 El E E E E E E El E E E 1 _l 1 c:i IE;! El E E E E E E E E E E ! E E E E E E El E E E i k: i El E E E E E E E E E E E 1 IS E E El E E E E E E El E 1 1 El E E El E E E E E E E E ! C'-J i OJ i IS E E El E E E E E E El E 1

0"; E El E G.j i3j E E E E iS E E E E i UJ UJ LU UJ LU LU LU U.1 lU UJ UJ LU LU E E E E E E E E E E E E E

._j i E E E E E Q E E E E E E E

_i 1 E E E E S E E E E E \~-< E E E E E E E E E E E E E E E i E E E E E E E E E E E E E E E E E |—1 E E E E E E E E E E E E E E E E E E E E 0 E E E E E E E E E E

UJ

_jo

LU 1 t—j I E E E E E E E E E E E E E

'I \ 1 ;r i LU LU LU LU LU LU LU UJ LU UJ LU LU UJ 1 i_i 1 E E E E E E E E E E E E E

a: 1 E E E E E E E E E E E E E

2: 1 1 _j 1 E E E E ® E E E E E E E E

Gi 1 1 _l ! E E E E E E E E E E E E E E 1 E E E E E E E E E E E E E

O'l 1 i 2= i E E E E E E E E E E E E 1 E E g E 1—1 E E E E E E E E

Gl E E E E E E E E E E E E

i-J I

l.i- O

UJ

Oi

Hi E LD r- ITi OJ r-o •:o U"i E E E LT; r\- iTl r- E E i:g 'j;i OJ E Oj i£i ro E iTl iji iTi ij> iji E Oj co 03 Oj t E E E E E E E E E E E s

•'S. 1 >i >; V. Ji

K ?-s a; 1 E E E E E E E E E E E s E 1 E \P E LT E Ln E m E LI E E 1 E E O! r--i fVi si Ln iJIi

116
LU

LU

IJJ Qi uj uj Ct CD ! ~i 'X X 2: 2: U. Li- q;

h- 1- =1

LU IJJ 0:1 LU IXI

OT 0:1 'X

5^'

COM

u

UJ

en

Q-

-o

in

n3 !1 IS i3 El El El El El 11.-1 i IS Gi 13 1^1 lEi E El E' E El 0 1 LLi LU UJ UJ LU LU U.I LU LU LU UJ LU LU

0"i iTi iTi U"'! iTi iTl iTi iT: ij-i iTi iTi LTi iTl

...J 1 iTi iTi iTi iJ-l iTi IJI iTi iTi iTi ai iTi Ui

._1 i iTi ij-i iTi iTi iTi iJi iTi iTi iTl Cn iTi 0-1

0-1 IT •,r, CTi ITi T-, iTi r.\ ITi lT| iTi iTi

r 1 iTi iTi ij'i iTi iTi :Ti iJi iTi iT; iTi di 01

CTi a-i iTi ij\ CTi iTi iTi iTi iT iTi iTi iTi iTi

i:j 1 0". iji iji iTi iTi iTi Ti iTi iTi iT, iTi CS ! <Ji 'T a-. iTi IT, iTi iTi Ti L'l iJi iTi iTi iTi O-J 1 is:i Si iZj El El El El E E El E E 11 El E El El E El El Ej Gj El Gi E El 3 i 1 i [ Ll! !xl UJ LU LU LU UJ UJ lU III LU LU LU LO El El E El El El El E E El E E

(=i ...J 1 El El El E El E E El E E' E El E

_] ._J 1 E El IE El E El El El E E E El E

Ll! El E El E El E El E E El Ej El i3 i UJ r 1 E. El E E El El El E rn E E E

u_ 1 i\J E E § E i El El El E E E E

El El El El El E E E E E

'X 'X 1 IJ'I H- 0

<.T 1 UJ E"! El El El El El El El El El E E E a ft 1 ._l

IJJ

•LU 1 El El El El E E E E E El E E E y i LU UJ LlI LU LU LU LU U UJ i.U LU LU i 1 1 1 E fel E E E El El E E Ei I'^i E E

•X 1 E E El E E E E E E E El El E j 1 I E El 133 E g; E IS El E E E E E

Qt 1 1 _J 1 El C" El E El El E E E E E E

El El IE E E El El El E E E E El

U .1 1 E: El El El El E i

El E E E Ej

El Ci El El

C E E E i E E E

IE El E El E' El E El E El El El E

i* 1 1 E ID ro r-- r^i lAi 03 Ll U"i f^- I 1 El E E1 ro U"i iTi r-- Ei

IJL 1 E on '£1 f.j El CU i.£i Ki iji CO 1 E iTi IT^ iTi iJi lT| CO 0:1 Oj 1:0 1:0 N- P-

._!

._! E E E E E E E E 0 E E E I 1 J-! 5>S J;; K >?: Ji J:>. 3^: 11: 1 E E E E E IE E E E E E E ! E Ul E Li" E LT E Ul E U"i E

lli 0 1 E E r-j i?-J ro rn -5 U-i irj 1x1

117
Gi IS IS IS & IS El IS IS IS IS 2

LU IJJ l-U IJJ LU IJJ LU IJJ LU IJJ IJJ IJJ iJJ IS iS IS IS IS IS IS !S IS IS IS IS IS

a _i 1 IS iS IS IS IS IS IS 13 IS IS s

_i IS IS IS

Q IS IS IS IS IS IS IS s

LU IS IS IS IS IS IS iS IS IS IS IS 1 LU r 1 IS iS

;i

IS IS IS IS iSi IS IS IS IS

u. ! M

;i

IS IS IS IS IS IS IS IS IS IS 0" > IS iS IS IS IS IS iS IS IS IS Ci iS

a <r 1 'J'i i— «

cr 1 UJ IS IS IS til IS IS IS IS IS IS IS IS i _l

Ixl

fy. a: o

rJg

CJ"J

•a: 1^

LU

"I ^

lK CS 'I S •! 1LT.1Z.

U_ IJ- 0£ O O I— h- -I LU LU o:i Z: LU LU LU O 1~ iK tK O — 'X I- h- z:

CO Pi oT iji •a: I—I u

LU(K

QjQ 1111 iXi iS iS I'Tl ITI El 1 CD IS IS fS iS 'S' s Is i"^ iliD 1 Ci 1 LU IJ-I luJ LjJ lU '.U Ijj 1 Jj 1 iJ 1 U UJ LlI 1 iji Ijl Ijl iTi iTi 'Jl 'IT'i 'ITl |V[ 1 I 1 O'l iTi iTl iJl 'Ti lT'[ 0''i IJ 1 iT'i U 1 iT'i 1 _J 1 iTl |T| iTi iTi Ci iT"i *Tl 'J ! IJ 1 i-f-, C"! 1 iJi iTi Gi iTi iTi Jl IJl iji iTi iJt 1^1 tjl a-i i iTl iXi 1T> iTi iJl iTi iJl iTi iTi tTi iJl iT'i IT 1 iTi iTi iTi iTl ITl 'Jl iTi iTi iTi cn iTi iTl 1 IS 1 iTi iJi IT-, iJl i7l \1\ iTi iTi ij-i tji ij'i iTi 1 Dj 1 iTi 'S-\ iTi iTl iTl iJi iTl IT; iTi iTi iji iTi IT 1 iS IS IS IS IS IS IS) IS iS is: IS 1

l3£ O1-

LU 1 IQ 1 IS IS IS iSi IS IS iS IS IS IS iS IS

LU 1 i 21 1 UJ LU LU LU UJ LU U.I LU LJ LU IJJ UJ r 1 1 C 1 IS iS IS Q iS IS iS IS' IS iS IS IS

•Cl i IS iS iS iS IS S IS IS IS IS ITI IS IS 1 _i 1 IS IS IS g

IS §

IS I'D IS IS IS IS IS

a; 1 1 _! 1 IS IS IS IS IS iS IS s IS IS IS S 1 IS IS 13 CSi IS iS IS IS IS IS IS IS IS

01 1 IS §

IS IS IS IS 15 IS iS iS IS IS IS IS IS IS 13 IS IS iS IS IS IS IS IS s IS IS IS IS IS IS IS IS IS IS IS s o 1 IS 'XI i:\i ro CO in in 1 IS IS iS ro r-- iji ^- iS

Ll_ i § on '.£i OJ IS i.D ro iT on

IT IT IT IT, iT on o:i on OJ iS ^- iv

_J

_1 IS IS IS iS is !S is IS IS IS iS iS

<Lo

LU

u.u1- i V. 5* j;

K

M ;v Vi Ji

\y. 1 IS IS IS iS IS IS IS IS IS iS iS iS 1 iS IS in IS LTi IS LD s in iS in ISi iv

1_J 1 is iS . OJ Oj Ki ^ ;n i.£t OC

isL UJ

118
CO

<X 'T. I- C

a:

ct: 'O: o

Utn P

cn

LU ^ Oi Qi

a:

LU

Qi

LU

U- u. id; O O 1- 1- ZD

LU LU i-J-J liJ lil

cn 1X1 01 I—

CJLU

Ct:

<4-

... I : _ 1^ •J.-I i-a- iID '3i iSl —

~-

'^1 '3 IS UJ 13 IS ' ' ; LU LL> , . LLl UJ 1 1 

UJ ijj UJ UJ UJ UJ LU 1 1 

IJJ

Q-( n~i rn rn 03 LU 0" ij-j 03

_J ! iJi ifl iTi <y> iTi IJl iTi iTi iTi iTi it'i 0-1 _! 1 iJi iJi >7\ iJi IJl 0-1 ;s 0-1 iTi iTi iTl IT. 1 iJt Gl C"i iji iT. lj'> IT: iTl iTi iTi Ti a-< x: 1 iJi |J-| IJI Ij) 0-1 iJi iTi IT, 1T1 iTi 0-1

iJ-( r"i IT: iJi C\ iTi ij-| ij': C-| iTi iTl iTl O-i Ci i IJI ij'i iTi iJl iJi iJl iTi iTi iTi Oi

'^j 1 'J ! t' 'Xl 'T'l 'Tl 'T'l 'T'l iT'i 'T'l O.J 1 Q 13 13 13 13 IS 13 13 iS IS 13

__^' 13 i-ij '—' IS IS

— -y~ [ i~i 1 'LU IJJ UJ UJ UJ UJ UJ LU L.Li UJ UJ iJJ LU IS 13 13 13 3 13 iS IS 13 IS iS IS 1 1 iS3 133 13 i3 13 3 13 IS iS 13 IS iS

_! 1 13 13 i3 IS 13 13 IS LS i3 IS iS IS

13 IS 13 13 13 13 13 13 IS 13 13 13 LU ^ 1 13 13 13 IS 13 13 IS IS iS iS i3 iS

r-j 13 ISQ IS 13 IS IS IS iS 13 rj ^ 1 <S 13 13 13 IS i 13 I5-. CD IS iS 13 13

UJ '3 13 iS 13 13 3 IS 13 13 iS i3 IS 13

iLl 1 0 1 13 13 i3 13 13 Ijj IS 13 IS 13 iS IS i 1 LU UJ UJ UJ LU UJ 1^ Ijj liJ I.U UJ uJ UJ 1 1--I I 13 IS 13 13 IS iS 13 IS iS 13 iS 13 i3

iS IS IS 13 IS iS rri IS 13 13 IS 13 IS 1 _1 1 13 13 IS 13 13 iS 13 13 13 iS ITi 13 IS

Lt' 1 1 _J 1 13 13 13 iS 13 IS :3 13 13 IS IS 13 13 IS i3 13 IS 13 IS 13 13 13 13 IS 13 13

iXl 1 1 21 1 13 iS iS is 3 IS El 13 iS 3 13 13

IS 13 13 13 13 iS IS 3 13 IS 131 13 13

13 13 13 3 13 13 iS iS iS IS iS 13

CJ 1 iS '.£1 in f-i OS ro CO LTim r--

.:X 1 iS IS iS i.M ro iT! iTi \r 13

LL 1 13 03 i.ri i"J IS Oil \r r-3 03 1 13 Di iTl PTf iTi 03 03 03 03 03 (-- r_

-J 13 13 13

© IS '3 13 13

Q 13 13 13

•I 1 ii Jf >i 5;; JS J?K 3': it Qi 1 13 13 iS IS IS iS 13 13 IS 13 iS 1 13 ir> 13 ij") 13 U".i IS IJ"' 13 m 13 LO IS

li0 1 13 13 I—

00 OJ I'-' ro U3 US U3

119
g,

o

LU ^

lu

LjJ QC D3 'I :_i (J. U. U- Ct o o 1— 1— —

i

ixl U 01 2: IJJ LU iil

cn 1=4 Lo o'j 'I

UJ

Ck:

ijj

1 J i3 Gi El El E El El E E^ El El El

iS E' El El El i^— Ef Ei El E' El El El

2r i

( 1 t LU UJ UJ LU 1 1

1

UJ LU LU LlI LU LU LU LU r- r- r-- r-- u:i iXi 'iJ in iJD i£i _J ! CTi 'Ti iTi iji iTi iTi Cfi IT-. iJi ij-i iJi 1J-: ._i i ij i iTi iTi iTi cn iTi iJ-! iTi Oi ij-i iJi iJi U:- iTi l- IJi IT'! iTi 1T-| iTi iT', iT' ij? iTi r; 1 iTi a-i |J1 Ijl iTi cn Ij-i iTi iTi iJl iT, iTi ij'i iJi iTi iTi iTi iTi IJi Ijl iTi iTi IJl iTi iJi

'3:' 1 iJ-i iTi iJi iTi iTi IJl iTi iJi CTi iTi iTi

O-.J ! ij-i iTi iTi iJ' iTi lT-| ijl IJI iJi iJi iJl iJi Ti

C'J ! iS El El El El El El El El E E El El

Ei Ei E El E E E El El 13 El IS IS

1 :r i

1 O.I m LU LU U LU UJ IXl LU LU LU LU UJ UJ 1

t 1—' i El El El IS £i iS El E El E IS IS is 1

1 _! i El Ei El IS E El El El IS E IS IS IS 1

i ._l i gEi iv ! El E E' El El E E E El IS :

1 k: i Ei El iS Ei El E E E Ei IS El ; El El El El iS El El iS El iS E 13 ! El E' El iS El El El E IS E El iS iS 1 E E El El El El El El IS E iS IS iS 1

El E, El El El El E El El El El iS El i

1^ i IS iS El El IS iS iS El E iS El El El ^ i

1 2: ! UJ LU li! Ixl Ixl LU LU LU LU UJ LU UJ LU

1 Ei 1 El El El IS Ei IS E iS iTl iS El E El 1 i E iS El E E E IS E E iS z: i 1 ._! : El El IS El i El iS IS :§ i" E E IS

QL i i ._) 1 El Ei IS El Ei IS El El iS E El IS El El ! E El Ej El E El E iS El iS E El E

CO 1 i r 1 El El iS El El E E iS iS El E El IS E IS iS El El El El El iS E E El IS

13 El El El IS E iS IS iS E El iS iS

1 1 H

1 1

1' 1

1 E i.£i P'-i ro i"J n CO tn IJ-I

1 1 'E 1 Ei iS E iM m LTi r-- ij\ r- Ei .

i 1 |J_ 1 E IJJ i.£i iM E OJ iXi fTi iTi ro 1 Ln

1

1 _1

1 E iJi iTi iji iji El OCi CO CO ijj r-- r- - i

1 1 _J

1 1 ''X

! © IS iS El iS E IS E iS iS Ei IS 1

I 1 ?S it '« ?4 K- ^^ QC i IS Ei IS El IS IS El IS E iS IS El

1 IS Ul E in E in iS El L" E ITi El a:o 1 E 15 iM w 'S) m

120
a I

(=1

CL-; ' I

LU .

UJ•-I UL q; !- ijj t— li: IJJ iJJ LJJ LU

ct: —m

m:'I 3 (X

Li. ij_ ^ ii: 1- IUJ ijj o:i

LLl IJJ

UO CO 'tX

2: ijj o Iu

UJ

D_

'ji-i ;±

ijj CD Cxi El IJiJ 'Jj 21 1 LU LlI Ijj Ll] LlJ LiJ |J_I LiJ LiJ Lu LlJ 1 1

LiJ OJ di OJ r-w r- r-- r-- i£i iXi i.n iJj IT) Ln

._J 1 IJJ OJ iXi co o:i 01' o:i OJ CO CO o,;i Oj O'J 01 a. ij'i iji ij- iTl O'l iTi Q'i iTi Qi IT, iTl C 1 r

*! iTi rr. 'Ti Ij! iTi a; iTi IJ'I rj-| r ! iXi o-i IT' iTi a"! >Ti <Ti iJi iTi iJi 0-1

iJi Ijl iTi iTi iTi n"i iJ'i IJ'I :T-| iTi IJ"-! iTl iXi ! iTi a-i iTi iJ] iJi iTi iTi iJi iTi Ijl iji i/U 1 0-i iTi iTi iT'! iJl iji O 1 IT, iji IT, •Ji 0-i 1 CO Oil IS cl Ki C Ci IX.1

IS El El El El El El El El El El E. E

§ Ijj UJ LU LU LU UJ UJ LU LU LU LU LU UJ El E El El El E El El El El

1 i

El El El El E El El El El El

_! 1 El El Ej El El El El El E El El g E El El El El El El El El E

iLi r 1 iX) El El El El El El E E E E El El M >Sj El El El El E E El E El El El El

•=T ! El El Ei E El El E El El El Ei El

i:n LU 13 El El El E El E El E> El El E El

UJ 1 !^ I El E El El El El E El El El E E El

LU LU LU LU LU UJ UJ LU LU LU LU LU UJ

1 E' 1 E Ei El El E El El El El E E E El E El El El El E iji.1 E E E E El

z: 1 i ..J 1 E E Ei E El E El El E El E

lii I 1 —i ( El El El g E E E E El El E El El

_i 1 E El El El El E El El El El El Ei El

ij'.i 1 1 ^ 1 El El El E El E El El El E m E i E El El E El E El E Ei El Ei 13

El El E El El El El El E El El E E

1 1 i_1 1 E 1.0 r- OJ ro Oj LIT U'l

1 1 'X i E El li.: 0-i ro IT) IT1 r-- iS

1 1 u_ 1 El iTi i.£i CM E i:o iXi iTi nr. LD

1

1 _J

1 E ai iJi m i7l iTi UJ CO iXi CO CO r^-

O) i 1 _J

1 1 iT

El El El E El 13 El E El E Ei 13

a 1 it It 3--: >! >! J-i >z >i

ll: 1 El iS El 13 3 El E El 13 E 13 i3

1 E IT) E ITi E ITi 13 13 ITi E Ul E

El 1 El El ITi Ul I.U

121
COQ

UJ

a

ll

to

UJ ^

LU

IXl

Lj_ u_ 5Z Q a I- i- UJ UJ 01

2: UJ liJ IjJ

u") 0:' i.o -a: U

Ul

LD

O)

UJ

U.I

LU

'3Zi 1^1 1^1 'ZD 1^1 1^1 li-l tj iS

j i3 C! iS i3 IS i3 El iS iS i2 IS

'IT' 1 UJ IJJ UJ UJ UJ UJ IJJ UJ UJ — UJ UJ U 1 Lll _i 1 ro lC 1X1 iDj r-. r- f~- fl r- r- !-. _J 1 iTi u

,

IT: iji iTi iTi Ijl iTl iTi Ui iT; i:ri Ml iTi iTi J^ J! IJl 1T-| ij"! iJi IT, IJ ' IT

k: 1 iTi iTi iTi iTi iTi a"i IJi iTi ij-i iJi IT: ij! Ul

iTi !jl ij 1 0"1 iJi iTi 0"! ITi ij- iTi IT. IT, IT: 1 .3 i iJl iXi u 1 iTi IT". iTi iXi 0"-. IJ-. iTi IT iTi Ti iji IT-I iJl Ij-I IJI iTi rr-i IJl iJi iTi iTf 0"i 1 r-j ! :S Ci Ci Ci 0 IS 0 c:i 13 IS IS IS IS

s IS IS 'S IS iS IS IS IS IS IS IS IS

i 1 : 1 UJ UJ UJ U-i Uj UJ UJ LU UJ UJ Ui UJ UJ

IS iS s IS iS IS IS IS IS IS IS IS IS

1

1 1 iS s IS IS IS i

IS iS IS IS IS IS iS

iSi iS IS IS iS IS iS IS :S IS IS

IS IS IS IS IS IS i

IS s IS iTi IS IS

! r i IS IS IS IS iS IS IS iS rs IS IS IS iS iS iS IS IS IS IS 'S iS IS s IS IS

i i IS •s Si IS IS IS IS iS iS IS IS CD IS

IS 13 IS iS IS iS IS IS IS IS IS! IS s

iTl

0

LU

•X

21

I CO

LU

f>.';

ft

LiJ

IS iS IS IS XI IS IS IS IS IS 13 s

UJ lU UJ UJ UJ LU LU LU lU LU LU IJ.J l_l 1 IS iS IS IS IS IS IS iVl :^ IS IS 13 13

iS 1 -.1 iS IS IS IS iSi IS i

IS IS IS IS

_l i IS IS IS IS IS iS IS IS Si IS IS IS

_i 1 IS IS iS IS IS iS IS IS IS IS IS 15

IS IS IS IS IS IS Ci IS IS IS IS g

r 1 IS IS iS IS IS IS 13 IS IS iS IS 13

IS IS IS IS IS 13 IS iSi 1x1 IS IS IS IS

IS IS IS iS IS IS IS IS IS 13 iS IS IS

u i IS i-D ro iM X 1 IS IS iS iM ro LT; u. 1 iS iTl I.M TT l"J i3 oil 'Xi

1 IS IT, IT iTi iTl IT 0:1 0:1

_J iS IS IS IS IS iS IS

CO Ul

Oj 03 IS IS i3

IT

<I ' K r: 5-i >i ?i •>£ 54 ?!

1 IS 13 IS IS 13 IS 3 3 15 13 IS IS 13

1 13 IX' :Ti LTi IS ID in 15 LO :S m 0

0 13 fl Pi Ul Ul 1X1

122
(-J _J

LU

<X c h- «

<r

(=1 o

1.1- • 1 0

1- z: f^g 1 LLl ! —

LO

LU • 1 0 1 UJ s| i 1—1

LU i1 a --' :r ii; Ql I- !.!J 1— CH U 03 UJ 1 ri LU r i: r 1 ir.i Qi: iri ~i '3: 1 jLjiz: 1 U. |J_ Q. 1 0 0 1- 1- r) 1 UJ IJJ 1/) 1 -c": LU UJ ijj

LO 1=1 0"! 'X I u

Cl_

LD

O)

03 1111! 1 1 1 ' 1 1 1 1 i3 iS ij.i UJ iXi IS Gil CD G.' 1 ! i ) L~' d Gj CD (ij QJ i.T.:i g:i Ci'; 1 1 1 :z. 1 ' d 1 UJ LU UJ UJ LU UJ LU UJ U_l ll'i UJ i f'- KD \r OJ )Xi p.- LT.i P'ii ' ' 0!'i ur; ^.r 1 1 -J 1 i!iJ El Q'l u\ O 'l ! ..J 1 iTi iTi IT; iTi ij'i iTi III iJi iTi 0" OJ ijj 1 |J1 iji ij'i iJl ij'-i S-1

iji a-\ ri 

cri iji 1 !id i 0 ij-i :Ti ij'i Ij^ iJi 0-1 iJi IJI O'l 1 1

iTi iTi iTi iTi IJ-1 iJi a-! iji ij'i cr-i ij'i iTi Oi 1 Ci 1 iTi O'l iTi iTi IJ-l iJi iTi Qi iTi i.Ti O'l Oj 1 P.I 1 iTi Ui iTi iTi o-\ iJt iXi iJi Ti iji iTi 1 iM 1 13 ID IS IS <TJ 13 'i;i Gj Cj 1 1111 11'11 C ijj

1-1

r- LJ Gj IS 1 f Gil 'SIi iXi G.I t3!i iH' 13 C'j IS 1 1 i„i \I UJ UJ UJ UJ tjj Ll! ijj LlI LU LLl LU UJ Ijj ! ] cn Oj CC! OD Oj Gj JJ Oj ijj 03 Oj m 0"> 1 j _J i CTi iTi iTi IT'; iTi G'i en iTi 0"i Ij'l T, 0-i ijj 1 1 1 tjt iTi i!Ti tXi ' CTi G"'i iJ'i i^T'i O'l iTi iTi 1 ' ' 1 iTi 1..' 1 1?

'Xiu 1 iTi ij 1 iTi CTi iTi O'l Oj i i '-^ i- ! 'Ti iTi iTi iTt iJi iTi iTi CTi iJi iT, 61 Oj 1 1 rvj lT| iTi iTi Ul iJ-i iJi iTi iTi IJI iTi Cl 1 1 iTi 1 J "I 'Xi iJ'i iTi Ci IT: LI 1 Oj 1 ! en iJ-i iTi ij'i iTi G'I i~i iJi iTi iT. IJ-. iTi 1 1 UJ IS c-,:i 133 iZ' 13 13 13 13 Cj IS iS 1 1 _J 11 u_P

UJ

IS IS IS IS IS IS S" IS g:i IS GJ IS IS

UJ LU UJ UJ LL.I UJ IJJ LU

u LU LU UJ UJ 1 t"l \ 13 iS IS IS IS g:i IS IS IS IS IS IS IS IS iS IS iS !S IS IS CD (S IS IS IS I ,.J ! iS iS IS IS IS iS IS IS (S iSi IS IS IS 1 ( 15 IS IS IS IS IS IS IS iS IS IS IS 1 '-^ 1 IS IS IS IS IS IS IS iSi § Gj IS IS 1 H I IS IS IS IS IS IS GZi IS' S5 Gj e:i IS

iS IS IS iS IS IS IS IS IS Gl E s

iS IS IS IS iS iS IS IS s iSi Gj iS IS

l'_l 1 IS IJJ Kl r-- ro OJ i-n 1X1 •I IS IS iM ro U"i r-_ Oj !

IT' u. I IS Oj i-n OJ 15 03 •D ^t 0"-| 03 I IS iJ: iTl IT) iT-i 03 03 03 03 03 r-- K

_1

._J 'S 13 iS 13 3 iS s 13 IS IS 15 13

•a: 1 >s >i St ?4 IS IS IS i3 13 IS IS IS IS 13 13 1 Ig LO IS IS tn 13 IJ-I (3 in 13 L-i IS ac0 1 13 iS 01 fj r>3 ^' T IT' a"

123
_J

Ly

UCEO

LL

C/j h-

_!

UJ

U- \X

LLj LO

Q •CE

M

K r:

0:1 CO u

LU

D£

0-

ra 3 1'^ 13 1— '3 '3 '3 13

•Zi i

1^: '3' '3' '3 13 <3 d" i 0 1 UJ LU LU LU LU UJ LU LU LJJ IJJ LU 1 i-'i (\i iTi CO Ln 03 13 Oil 1 i 1 Ij~ 1. n r«-.! 13 '3 •Ul 1 ij iTi [j-i _J 1 hi iS-J i"J i f- i.T' KJ 1 r- p.] rl !?.] O'l ' 'J r ' r- 1 k: i 13 '.J3 ^ C'-.J IJ' r-._ LO

r- CD CO !.£ Ki r- CJ 13 1 13 Si Ti IJi iJi iji CO co UJ 13 0:1 1 C-J 1 r>- r-- r-- 'Jli in ir: '•£i i.n 13 13 1 13 13 13 13 13 IS 3 3 3 13 13 13 1 o

LU

LU

13 !3 3 131 3 3 3 31 3 3 13 31 3

13 i 13 IJJ LU

m LU UJ IjJ LU LU LU UJ UJ 13 3 i

13 3 3 3 3 3 13 3 3 ^ i 3 13 13 iTr 3 3 3 3 3 3 3 3

_J 1 13 3 13 13 3 3 3 3 13 3 3 3 1—' 1 13 !D 3 3 iTl S 13 3 13 3 3 i3 i3 13 3 >3 3 13 3 3 3 3 3 g

13 CD 3 C~ 3 3 3 31 3 3 3 3 13 ^ i 3 13 13 3 3 13 !3 3 3 3 3 3 13

13 15 3 3 3 3 13 3 3 3 3 3 3'

LU ! ft i 3 i3 3 3: 3 3 3 3 3 3 3 iS i 2: 1 ijj UJ LU IJJ UJ LU UJ UJ LU LU UJ LU LU 1 0 ( 3 3 3 3 3 3 3 31 3 3 3 3 13

•a. 1 3 3 3 3 3 3 3 3 i3 3

z: 1 ! _l ! 3 3 i~i© 3 31 3 3 i 3 3

QL \ i _J ( 3 3 3 3 3 3 3 3 3 IS 3 ; t 3 3 3 3 3 3 3 3 3 3 3 13

UT i 1 n i 3 3 3 3 3 3 3 3 3 >3 13 3 3 3 3 3 3 3 3 3 § § 3 3 3 3 3 3 3 3 3 3 0 3 3 3 3 1 3 3 'D CJ 3 Ul 3 I 1 3 3 i 3 3 3 PJ CJ rrr U- 1 3 iTi rv '.£1 ? 3 1 3 1T1 iji iTl iT, iT'i iT. CTi CO 3

_1 3 3 3 3 3 3 3 3 3 3 3 3 i 3J ?•! ti J4 K 54 i 3 3 3 3 3 3 3 3 3 iVl 3 1 3 iJ-j 3 LTi i irt 3 LO 3 in 3 ir.i 3 0 1 3 3 CJ Ki LTj

124
13 13 12 Gt 13 13 3

iD 13 Ki 13 IS

d il.- C3 13 13

L.I 1 UJ IJJ IJJ ijj ii^ IJJ UJ UJ UJ w. IJJ 10 M CO iT, Iji i !

UT tri iS 't IJl [<'} LTi Oj iJi _J i _J 1 IT: Oj Oj c <t e-j LU 1 Ci !T, r-- Ci i.j:: 1J1 iTi ij'i i LU r i Oj r-- o:i iji iji \r I'O U- 1 1 r>j •Ti h- LTi ?

OJ iji IJJ i.£i in Ki OJ ro ro ro CC ! Oj OJ ;:o UJ 03 Oj o:. Oj Oj ffi Oj Oj o:

;-- 1 :X 1 1 UJ >3j Si Ci 13 iS 12 'Si 13 13 3 1 i 1 13 13 13 Ij..! i3 13 i3 3 ijij i i 2: i 1 1 1 1 1 1 ; 1 1 1 i 1 1 1 i Cj ! UJ UJ ijj UJ IJJ IJJ UJ ijj UJ UJ UJ

1\- r-J IJ" Oj CO 13 CJ O-l ! 1 _l 1 LTi 1.0 a-! r-- i3 13 i

13 iTi ! \.n. 13 IJJ C'-J i3 iji ro CO OJ

i"0 iT, Oj IX' r-- OJ 1 ' ^ \ I'-- 13 m i.n rr-i 10 l>- OJ 'XI 1x1 0.1 1 1 i iji 0-J i.n OD ro 1.J3 UJ 1x1 1 1 13 1 'J Ki 1-0 i3 13 a^^ 0:1 r- ;v IXi 1 i i>J ! 03 Oj Oj CO IJJ t;o Oj r-- r- r-- r>- r- r-- 13 3 13 13 13 13 13 13 0 iS 13 13 13

lAJ m o

Ul

QCa

LU

'XI 1 13 0 3 |3 13 15 |3 13 §

13 13 13

ft i 13 13 13 13 13 '3 13 13 13 13 13. 13 i 2: 1 UJ ixi UJ UJ UJ UJ UJ UJ IjJ UJ Ixl UJ ^ i 1 i_j ; Oj .0 Ul '3 i.M Iff IJ^ s

13 U~i 0\ <D 13 Ij-i •M 1T1 iTi i:y OJ : -J i Wi 0-J 0-J 13 OJ u: ro 'X' 0-J qS i i _i i IV s

OJ OJ OJ Ul r- 13 'X' 3 1 'XI OJ LTi r-- ro iji 3 i-X OJ 1^- CO 1 1 i: 1 3 !3 13 iT; ! Oj Oj Cj I--

I"'- r- r-- r-- 'Xi 'Xi Ij"! IX iXi 1x1 ;:s

iji iji iT, ij". Ul Ul iTi Ul IJi IT) 'i Ul 13 13 13 i3 3 13 13 iS 13 Ci 13 13 13 0 1 13 i3 iNi 'X Ul OJ 1.x 3 LTI 12 'X' <r 1 13 !3 13 13 13 IS Oj OJ m

U- 1 IS Ul Oj 1^- 1X1 IXi ? ro OJ 13 0: 1 13 Ul Ul Ui Ul Ul Ul Ul Ul Ul Ul 1:0 -j

_J i3 13 13 13 3 13 IS 13 13 13 13 iS

3c:

n J? ^^ :>: iS 'S 3 i3 IS 13 13 iS IS 13 iS IS

ltj 3 in '3 LT' IS LO 13 in IS IJO 13

13 i"vi iM \i xi- ij"' in 'XI

125
'SI' Ci Ki 13 El

O El El

g:. Gi El E'

'3 1 U.I IJJ UJ IXl UJ UJ UJ LU UJ UJ UJ U,l U-i DT 1 r-j 'Xi Lf) OJ iXi CJ r..i O 1 _J ! IXl iXi m r- 'vT ij'; r-- _J 1 ._J 1 in in lt; Ul i'aj iTi LU 1 r>- m r-- m 1X1 a-i !T"I Q 05 in iTl i UJ 'XI \T> iTi vr a:i U"J m I'j Ll I 1 r-j o:; IXi r'j Oj T'-i Ki OCi p?J E,

yT ! r- 'Xi 'X- 'Xi LTi \n UT ITi \r CE 1 t- 1 1 U'l LTi LTi tn LO LTi LO ITi LO LTi LO

CE 1 i U.I Ci iS i5;i Ki iS 13 13 El El

ro

iiJ

u.

T—1r-A «—1

"7~ 1 El1 El El 13 El El E 1 El1 El '3 1 a UJ UJ 1 UJ 1 LU 1 LU 1 UJ 1 LU 1 UJ UJ LU 1 1 UJ 1 1 Ul 1 10 'Xi Vi in UO in r.- r- iXi u;i ro p«:i 1 in El Ln OJ OJ in iS |V) iTi CTi r<;i E 1 _j LTi r- El 10 'Xi El CD Osl rs- ro iTi 1 in El 'XJ OJ OJ ro in CTi ro iTi in 1 LTi m El iXi 'XI OJ El El y£> Ln ro OJ 1 El III iXi ro iTi rs- U-J OJ El laj iXi ^ \ 13 1 rn CJ OJ l^J OJ 1.3 El El 1 rj 1 CJ OJ Oj OJ iM 0-J OJ OJ OJ Ovl O-J OJ O-J 1 lAJ 1 El El Ej 13 E El Si Q El El 1

UJ

!x) 1 El 13 iSi El 13 i3 3 '3 E i3 E El

1'^ i E' El 13 El El i3 i3 13 El El El '3 •3 UJ 1 1 X 1 Ixl IXl UJ LU Lu ixl LU U UJ IXl U IJJ LU 1 O 1 LTi 13 El r-- ITl 03 i3

3: 1 UO UO Ul ro r-. iXi iTl OJ ro 1J> i3 :r 1 1 —I 1 iTi OJ U1 ffl rO' Ul El 0"! ro 03 t"'^i OJ

li: 1 1 ._! 1 ro 12 'd- r^- iTi 03 iXi i?-J rv. 0"! El Ul iJ3 ;3 1 h- "xi- i3 'Xi OJ iXi iP LTi E 1.XI IT: no

IX) 1 OJ 13 r^ in ro 3 n- U3

in in in fo ro ro

0:3 Oj iXi III 13 o:i 13 03 03 03 03 13 03 El •3 13 13 E 13 i3 >3 i3 El 13 3 1 iS iS OJ ^- ij3 Ul OJ 1.J3 i3 in i3 i.iO •T 1 El 13 E' i3 3 i3 13 OJ OJ ro ro

U- 1 i3 Ul CO rv iXi LTi •vT r-T OJ El Ul iJCi 1 iS iTl Ul Ul Ul Ul Ul Ul Ul Ul Ui 03 Oj

_J

13 i3 13 13 13 13 3 13 3 3 3 i3

a 1 J-i ^5H V4

?-i 1 '3 1.3 13 13 i3 13 i3 13 3 13 'XI 3 1 3 in 3 !Xi El in E'l liO i3 in LO o 15 00 0^1 ro ro i LTi UO 'Xi

126
13 CD El E El El El

<S.' El E El El El ij!!i Gj

1—1 t lli UJ IX! LU UJ UJ L'J U.! UJ UJ Ixl UJ LO 1 OJ iTi LTi OJ !."J U"i ij^i O 1 _l 1 r-- r- o:i di El r- LT. EL _J 1 lT| h~> r<"; iTi iy xj- El iXi IV U"i 1—1 1 rv; r- iTi El ro ij:i LTi LO 1.^1 LTi 1 LU Oil i.£i i>J ijri ^- ITi r-- 'J .1 U- i 1 r-.j rg U.I iXi in Ki iTt ^^- CJ El 1 E' El iji iT; iji iJi i rn ro ro Ki Qi f-j iM 1- 1 a 1 1 UJ 'SI' IS El El El

LU

J1 o) OJ OJ OJ OJ O-.J OJ OJ OJ OJ OJ 01 1 El Gi El El El El E El El El 0 El 2: 1 1 1 1 1 1 1 1 1 I 1 1 T 0 1 LU IJJ LU UJ lU 1 U LlJ UJ LU LU LU LU LlJ r- ro r- E) CO Pi'i ro IXI El Oj OJ . 1 1 OJ |j"i 0-J r^- OJ in LO LTi ^ 0.1 iTi IXI _J i rn LTi I.X! ijj r-v- r-- r-- r>- ixj iXi

1.

n 1x1 03 El IXi *x E CO 1, '"1 IX iT , l£i r^i d 0 ro i-Xi Ij'l El OJ iXi 13? El OJ XT IXI Oj El O..1 S 1 OJ IT; 0:1 03 r- 'u Ki

Ovi 1 m on oil \-- r-- r-- r- r- r-- r- OJ 1 El El El El Ei Ei lEi lEi E

LU 1 El E El El E E E El 13^1 E

(-) i El El El E E El E E El E: E El E^ UJ 1 LU LU LU Ixl LU UJ LU LU UJ tu LU LU u I i_i 1 CO Ui 'Xi 03 ijl 1X1 rn Ul 5 1 LTj oj El UJ uo CTl iJi OJ OJ ro ro Hi 1 ! _l 1 r- iTi yo iTl LO 03 iXi OJ El T; 1 ct: 1 1 _J 1 rn in iji 03 03 El E r-- ~i 1 Oj uo r-- 5- El 10 u:i OJ r>-

0"J 1 iXi ro ij-i iXi •'J iaJ ijS r-- OJ ij) r- LO LO ITi n ro roi ro OJ 0.1 1x1 Xi IXi I.X iXi Xi 'XI 'Xi iXi iXi IX Xi 'XI El El El E El E El El E El 'XI OJ 'Xi E LO El 'Xi El E' E E El iTl E OJ Oi ro' ro

El IJ-l CO r^- iXi LT.i ro C-J Q"l 03 El iTi 0^1 iT' iJi iTl iJl ij) Ui iT> iTi 03 Oj E El 13 El E El IS El 13 El E E I 1 ?<; 5^^' 5^ Q£ 1 iTi E E E E E El E IXI lO E E 133 1 E in E in El IXi El in E U3 E in El

tf- 1 133 E iM OJ roi IT; no u?

127
1111] 111j 11I1 r-j r-j eg C-J OJ rg OJ OJ OJ Os! 1 j I j E: IS IS1

iSi1iSi1 iS1iSi iS 'S1 r . T

iS 1 11 I "7^ i Cj 1 1 LU 1 LlJ 1 Ixl 1 UJ UJ UJ LU LU 1 UJ 1 LU UJ UJ 1 1 UJ 1 CM 0-J O-J 1. ' J IJTi Ci r^- 1 _j i PI r- iXi 0~i IS .—)

<:! OJ ro ^ -^r 1 ,j 1 ro iXi IT, IS W) Wi iS OJ 1 i

>i>

n 1 03 '£} -^r r^- 1 rn r- iS g:i ro r--- OJ 0.' o:i ro iTi 1 iS m iS b$ r\- r.i ro iTi 1 'p in OJ O-J tt ^ - ^ vr i- tt 1 I

0:\ 1 l3 IS S iS iSi IS IS IS iS j11jjIi j11t1} 11j111 IS iS IS iS Ki iSj IS IS o iSi d iS i j El IS IS IS iS iS IS IS IS iSi IS IX.I ! 1 I "2Z \ 1 i~' 1 UJ UJ IJJ LlJ UJ UJ UJ LU UJ LU UJ LU LU 1 LO ! r*'i (\_ '1.1 •Xi LHi f3 i —! ! n.i iTi IS r^- m in iXi iXi OJ 1 -J ! i _J I i>J ij 1 iT-i OJ rn ro fv xr 1 LlJ 1 li^i lA.1 1 n ro •T'l |j"i ITI 1 j2( m 1 LU' 1 i LU T, ! r-- LTi cc |^J LR iTi ro' '.£1 IS i3D !J_ i 1 FnJ i i-ij Ul —1 iS on i.£i y-j OJ iS IX' ^ 1 IS IS IS s IS iT'i iTi iTi iTl CTi o:i (to i ^ i i 01 i?j i>j 1>J OJ d 1 ! I-iJ IS IS iS cs iS iSi IS IS IS Ci IS iS iS 1 i _J OC I ! LL a i

013

(Ti LU

LU>

LU

UJ

LL

UJ

7-

UJ 0:1 2; I- O « — I- z: OT ijT 'o: o

UJ

LTi

UJ

LU

1' 1 1 LU 1 IS iSi iS iS iS IS dl IS CIi i» IS iS 0 1 iS 1x1 iS IS IS Ci 'S IS IS ISi iiSii IS IS

LU 1 Ixl LU lU LU LU LU UJ LU LU LU UJ LU LU 1 1 t 1 OJ LO OJ 00 iS OJ OJ 1X1 s IS r-- iTi <Z 1 ir.1 ^ -r—1

'Xi iTl iTi IV OJ 'XI r-- LTi OJ iXi 1 _1 1 ro OJ OJ iSi iTi if) OJ iXi \r r-- oZ 1 ro iS ID iSi C-i ro r^ OJ IXi P? 1 1 \r Ui fO m OJ 'Xi IS Oj LTi iXi 01 1 i r 1 "cr ijl iXi \r iTi (XI r-i in in

iS IS i-n iS iTi iTi cn iji CD an 63

LO in LTi U"J \J1 LTi \r

IS IS iS IS iS IS (s:i IS IS IS Si 1

1 IS iVl OJ IXi iTl OJ 1.x IS LTj )S 1.x .x 1 IS IS IS IS 13 IS IS OJ ro ro

IX 1 15 iTl 03 b- ID ITi -V ro OJ CD ITI OQ 1 cs U) iTi cri iT\ Ui iTi 0"! iPi 0:1 XI

_J (S iS CO IS iS IS IS 0 IS IS ss> IS 1 >2 •>« 5v-;- >? 1 iS iS iS s iS IS iS ij^i iS Ci iS i3 IS 1 IS in iS in IS ir.i IS in iS in 'S in iS 1^ ; 13 (D OJ OJ ro ro LO 10 Uj

128
j iM iM OJ OJ CM CI Csl o.| C'J OJ eg CJ

_ 1 iS

Qi iS1 El1 El1 El1 1 Q1 E'1 'E'1 1 O 1 1 UJ 1 LJJ UJ LU LU LU UJ LlI U_! UJ UJ UJ Ul

CO OJ CO h- ro h"i OJ 'in

ij3 CO 'JD LP ^- 03 l_ri r^i CO ro '"J Zj i & rv- IT. co 'i r-- r^- K' r-- r^ ••i CD LO i3 '.£) 03 C-J ro

GO '-r

i.ri ro 'x-l ro El on in ro

i!n 03 LTi OJ LiM OJ

ro ro l>J CO iM Er E

iSj I ro ro ro ro ro ro ro ro ro ro

i3 K- IS i3D E' El E El E' E

Ul

rvj

ul

UJ E El El E'

Q El E E El 'ji-i E '33 E El E E El E E El El

JZI 1 O 1 U UJ LU IjJ UJ UJ UJ Ui LlI UJ LU UJ UJ

LO IJ1 CJ in OJ r-- LO 01 ir.i E

_1 1 T'- ifi LO 03 i,o CJ UJ ro i.n iTi _J 1 I.JJ LO iTi O-i ro KD CJ E iM 1.1:= ro

IT-: LO OJ LP C! <Ti r- LO r<3 E

CO LO OJ

LJ CO LP CM iTi i.£i CM

i~1 rl LTi ro CJ J-i Oj UO ro

•Kt 1 L'; LTi LP LTi LO LTi b~

w XT

'^ Tt E E' E' E E El E E E E Ei E

u;i

LU

UJ

UJ

=3

O

f_l

_J

_1

UJ E E El E El U.I E E El E E E E E E El E

2: 1 LU Lli LU LU LU U- LU Ui LU UJ UJ LU LU 1 LP r"! OJ ij-i 'J E E LP r-- C^i r^- CJ r- ro E E iji i.n 'Xi ro LP

i£i IX' 03 ^ i3^ \f ro roi Ul iji

iTi E E 03 f3 ijj 03

r^ OJ 03 roi 03 CJ CM E 'J"

r<:i 03 iXi r-T 03 'Xi ro CO 'Xi ro

ro CJ CJ CJ CJ E' E E

\r X' \r E E E E E E E E E E El E E E' CJ 'Xi iTl CJ LX E Ul E i-D E E Tl CJ ro ro S 03 r^- iXi Ul roi CJ en CTi E iTl iTi iT> iTi iTi Ul iJi oi CO 03 E E E E E E E E E E E E

a!

Io:

a:

QCo

(aUJ

N 5-^ 3^ E ivi E E E El IS E (ID El E Ul E ITi E LP E Ul E LTi E UP E E E Oj iM M ro Ul ID

129
QlC

LL

CTj K-

_Jcn

Ql>

LiI B

Ql ,1

U- £ c Q — 1-2:

Lo on 'O: u

LU

Ql

0-

cn 1 i2 Ci 1 13i IS! t IS g:i IS IS IS iS IS a 1 1 IJJ ! LU LU LU LU 1 LU U.! UJ 1 UJ i LU 1 Ll! 01 i ]-", ro iTi iM '£1 i

LO ro IS

(~j 1 _j 1 r- TT ^ C' IT: iTi IT) ['1 T'-.i Oj i 1 _j 1 • Oj LO ^ iXi OJ 10 OJ LU 1 LO iXi u-i OJ 0.! IS Oj G'. 1 IJJ r 1 r^- LTi 5- r<"i eg <?-i r>;i U- i 1 rj CJ \r in OD IS OJ 5 w IJJ IS OJ T ' CO I..D iXi Li" ro OJ OJ IS.

'-I • 1- 1 1 (J-) ij 03 CO CO CO CO CO CO CO 00 IJJ

CL ! I in Ci 15 IS

Q IS IS IS iS IS IS IS IS 1 i _J

r--

LU

|-|,

J OJ r.j OJ 0 i eg J-'..J 1. '-J

_ .

1. ' J - _

1. j

f. 'J iTl iSi iSi |r-| iSi l-i-l 'X' tZIl ^ 1 1 t I j j ! 1 ! i ! 1 1 

. i 1 1 1 LU UJ UJ LU U_i UJ i 'J 1 1 Uj Lij DJ (JJ

IT) r-- l?J IXi s iTi C-j _i i IX' 'Xi ^ OJ [\- i

OJ ro ro

_i 1 iS ro IT' iX IXI 0-J 00 CO ro

l.'j :o LO IS ku ro iSi 'Tr CO 0"-i iS 2 1 ro io r^- OJ LTI r- r^j U~i Oj ir,

lTi r--- Lj-' OJ IS co IV uo iSi C'J iS 1 i\. rv_ r^- i£i •Xi 'Xi '£1 IX 'X ir. OJ 1 OJ ! iS iS iSi iS iS iS iSi IS IS !3 iS IS iS

Qi

OH

UJ

LU 1 iS IS iS IS IS IS IS IE iS IT. iS 0 1 IS IS IS IS: iS IS IS & IS iS s iS 1 2: 1 LU LU u LU LU LU IXl UJ LU LU ixi ^ 1 1 a ! Lfi r^- r^- ro OJ ro Oj OJ ^ Iji C-i -X 1 OJ uo Iji ro ITi Cj ^f OJ i- IS OJ

z: i 1 1 El 1x1 r- Qj ul OJ yi 133 Oi

a; 1 1 ._i 1 IX. in !Xl IS yo CO S ! iTi 00 CO ^_ r- 1.0 LO UO OJ

CO i i r 1 OJ s CO iXi OJ IS CO i.£i OJ rO

iXi Oj r\- r-- rv S-- r-- i.£i tXi 1x1 iXj i-X OJ OJ OJ OJ OJ OJ OJ OJ CJ OJ OJ OJ OJ

IS IS IS (S IS s iS IS iS 0 iS IS iS 0 1 IS IS OJ 'Xi iTi OJ ^x IS bO IS X 1 IS 15 IS IS IS GZi OJ OJ ro

IX 1 IS •7\ Oj r^- IX LTi iri OJ IS iji 1 eii <T\ i7i iTi Ijl iTi IT| iTi CTi IT: iXi CO -J_J iSi IS iS IS 13 d IS IS IS IS

'D

ro ! K 54 j« >i >? 5-i J-S K ; IS iS iS IS IS IS 15 IS (T. iS IS 1 IS m IS LO IS in IS LO iS ITl y IS

iS i IS IS OJ OJ ro ro \r ir? LJ 1X1

130
I[ j '. IT rr ' pri PO' lit '-^ Q '"t"' 'SI' 1 j fr i I ll- 1 LU 1 LU 1 LU , ' UJ 1 lU , ' IJJ LL: i LjJ LL. 1 1 )

LU 1 1 

d' p- f O '31' \i ' O 'X' ! r*- 1^ CT' 1 ».j OS —! i K 

'X' LT' 1 n 'X OJ

f? rn U"t 13 r- r~ CP ro

ro Xi Q", ro 'Hi

'X' r-w C'J rn PO CT; in CD !.£ X' Xi U"J Li .» ro OJ j ii^j 1 vtC'nI i ll".' i

IX? '3 13 11 1I;!!

-r- 1 r ~ J

i^' j 1 1 ! 1 lu LU LU 1 j 1 1 LiJ LU j LlI LU ; lu 1 1 1 to 1 ! UJ '. 'J

iT-j

LD:

f\_ ~^•Xt 'Ti 1^ 'J( 'X I.X* Cl j —' 'jD i Ti r-.- X' r'-— LTi 'D

UJ 1 ltd pj Xi f-^ ro PO LT" 03 ro

LU *' lj> Ll~' iji IT- '33 XT ' ' I U. '

'- ! 

J—

U 1^ > V 3 LT.i -sT P-"! r-3 OJ OJ

d 1 yp> i O.J OJ -"-J r-j '?-J :"j 'OJ r»j K 1 X i LiJ i Gi CT! 13 '3 i 1 1

or. i LJ 1

Li_ !

LL 1 1 Oj V i j h- i _J 1 LU—

j CTi 1 : LU 1 CiL ! ' j UJ :: , , — iV' GI' '3 1 1 1 1 i ! 

1 j T 1 ( I LU 1 UJ . . I ~r- 1 LU LU U i LU LU • LU 1 1 LU LU LU UJ

-'^ ' I «^ 1

[-j-j iT' I'D 'J- 

P'"ip . u~

!-Ll 1 CL l_fi LO 'X L'J CO , Oj ij", f\. X' 'X' r"r C-J QC 1 j Ll 'X C~' [\_ 'X 03 0-i 1- LU 1 . 'X P.J PT' Xi P.J 0"'i X

UJ

r i ,I !^ {t) CTi 'S l^' LTi Qi 'X i \r '"1 |V( 'T'l Oj i._ri LO 7Z 1 1 cf'i (Ti '3D 03 CO 03 llL' LL on i i Q 3 i El '3 'SI- ' d: '3

UJ \.n i 2: 1- f Cj -X i::^ 1 — !- X 1 CO i:o -x I 1—« 1 U 1 UJ 1 Oc I Cl. 1 r-i

'_j

M 'X 'Ti 'IJ

T Pi i3 'D

i5 '? '"D l\l h3 l_o Ll Xi U~i TT

C' Cl iji iT^ 'Jl (T 

ij"' Ij*! CT'

CU j . _l 1 ^1 -a:

illi \1j 'D i3 'S iS

±^ 1 I o1 »~

111 1 LU i n

5^ *^ 1 1^ © Gi ifl IT' iS c'

LO Ti in tn L^i iP iD in 1 ii: 1 I. J ip Cvi ro -r nT LT' in in. 11 CU f UJ

131
1i1 !]11 rn ro ro

r

"1 ro ro' roi fO ro ro' ro rOi 1 j iS IX' iX' tXi iXi (X- iXl 'X' iXi i ~7- 1 1 T 1 1 i T 1 1 1 1 1 1 T i a 1 u LLl UJ LU LU UJ LU LU LU LLl UJ LU UJ i IJJ C--1 'Xi r-- CO 03 IT 'Xi ij~i ro 'Xi OJ

01= co ro! O"; C'J OJ 'X' U"' 'Ti Zi 1 0-J 'Ti "X' 1x1 r- OJ U'l XT r- 'X' OJ

iS ro 1.0 CO 10 ij';i 'X' 'OJ r--. I'M ro t r^ iX ro UO 'j:i i \ 1 ro 1 Oj LP '~'J 'X' r- 0"1 'j3 El i IT"! Oj iX' r-- i'- \\. *X' tXi 'X' IT' LP

0-.] 1

'. ' J i

C'J Oj C'J e.j C-l C'J i>j Oj 'OJ P-1 OJ 111 i

iS- I'Xi IX' iX) 'X' iXi 'X iXj iXi iX 111i j]11 1 .^^ i ~r j 1 CJ iXi1 'X'1 r

'X' T

»Xi 'X' 'X' 'X'jIX'[ iX1

1X11 i i Lu Lu UJ LU LU LU 1 LU 1 LU 1 LU iU UJ LU LU

I'n ! 1". 1 ro OJ IXi LiO i.n iTi iTi 'X' IXl '>J c:) 1 -J i I'xi i"j O-J 'X; r*:' r<:' l'-| „ 'X' r\_ 'Xi _! 1 UT i.£i rv 1x1 '?! r-- 'Ti 03 LO

LLl 1 ! [ 'Xt '•13 fO iX" iTi 'Ti 'X' ro 'X' iX

t—• 1 i ! ! i 1.n iXi Lfi' 1X1 LT' 'Ti Gil LO 'i-j liO , , U_ 1 r^j i j r-- U"i IT, r^- ' 0 Ln roi CJ iTi 1 1—f j ^ i W) LTi IJ" LO LTi xr r-"' •:I 1 CO 1 i— 1 j a 1, Ixl i iS 13 1X1 'X 'X' iXl iX 'Ij 1X1 'X' 'X' 'X' C i ! 1 i ! 1 a: ! u_ i O 1 ij_ i1 IT. O'l 1 ! 1 _; 1 Z3 1 LE CO 1 tJj 1 r "i j 0-i i ijJ 1 o i jj

'Ti1

IS? •xT

'X'1 '31

;Vi1

'X'I iXl 1

'X'1

'X' TCD1'X'1 Lii 1 UJ j 1 1 lIj LU LU LU LU LU 1 LU LU UJ LU UJ LU i 0 1 r'"i i.£i Oj iTi 'X' '."^J iT' IJl uo iJJ LLi 1 •i ro LO iX' >£- r^- ro 'X' 'OJ ro

.J i bO 03 ro ij 1 03 00 'XI ro ro LO Ql 1 _1 1 "i-i Oil iXi LTI i7J ro 'D '"'J IX' iXi !— LU i ~i 01' i/j IT) 'T } ro iXi ro' tXi .'X' UJ T. 1 (.0 21 1 iTl r-i 03 OJ r-- <£ 1X1 LTJ <Xi tX ;I 1 iTl 03 Oj r-- r-- 'D 'X' uo yo ro 1 in lo LTi uo Ln LO to in uo LO LO LP ITj U- 2 1 1 O —' 1 'X) '3 iX' <Xi 'X' iX' i3D iX' i.\.' 'X' IX UJ iXi 1 j1 C ':X ft i i >—' H 1 0~' ' 0 '--L t ] 1—! ' 1 O 1 ] LU 1 1 CiL 1 1 Q_ 1 in

i— 1 1i ' ^J 'XI 'Ti trv 'X'

UJ 'i.' 'X' ^ 1 •I iXi 1X1 133 IX' 'A.' f'J iM ro ro' 1 Ij- . 03 1.0 LO ro 'Xi 'Ti 0"' S iTi iTl iji iJi <T< iTi <7l d"i CTl rfi 03 03 1 1 1 1 el

Cli iXi 1X1 'S 'X' iXi iXi 'X' 'X' iX' 'Xi 'X' S 1 O i 1 1 1x1 1 1 1— 1 1[ 111! 1 IJJ 1[ 1 1 f- j 1 <C J-i i 1 Qi I ei iXi iS iXi 'X' iX CD 'Xl El 'Xi 13

LTi CD in LO) iX (X' in 'S' no 'X' 1 1 n: 1 1 a OJ OJ ro m IT' w 1 1 li: 1 1 UK 1111 I LU

132
''I 0-J .--J l>J iM 0-J OJ OJ OJ r-j OJ Oj i 13 El CJ G; El E EJ El El E El El 1 2: ; ( ; ! 1 ! 1 ] 1 i 1 1 ( 1 1 LO 1 O 1 LiJ LlI Ui LU IJJ UJ ijj |jj L'J LU UJ UJ 1 U"i E ro r>- ir.i i.o OJ y~i i"J 1 Q i ._i 1 n,i uo r- uo E r-w \r ro ! -.J 1 ^ 1 r-- Ei El Ei Wi iji O-J ro ! UJ 1 Li"i in ro r~ r- ro iT'i CJ o:i in : 1 LU r ! rn r>- IT. ro QJ i?-.j r-- r-J an ro i u. 1 ! r-.j CO Ei ro iji iT; LO OJ CO in i a- i H 1 ^ : xT ro ro roi O-J OJ 1 i o:, f) ro r\ J ro ro ro ro ro ro ro r'"i ro ; <r 1 ! LU 13 i3 •S Et Ei E El Ei El El El E 1 Q 1 1 _i

xT 'm

;3; \r E E E El El E liJ El

•t El i-ij El E X 1 1 ' 1 1 1 i 1 1 1 1 1 1 1 a i LU LU LU LU UJ LU LU U-l LU U_! LU LU LlJ

Oil r^— i-il' r' .1 Li .1 U~' iT'i iT'i 1 fj •El _j 1 uo Ei iTi OJ E iJl ^ El CO El

_! 1 LO r>- CJ El ro iJl CQ CD IJJ a\ El

in 1.0 r- r- ' r- on ^iJi OJ

r 1 LiO OJ in iT-i ^ o:i ro iJi I'T- r-- ?

OJ Oj uo CO OJ IX! Ul ro E 1 r- i-r UO LO ro ro CM El O'l iji 0-1 1 1.X' ijj i.ri i.ri UJ iXi IXI |.£; i-Xi iXi iXi u:i uo o; ; El El El El E E El El E E El El Ei

UJ 1 t-i 1 E1 f E El El El El El El1 E1 E Ei E ^ i UJ Lu : LU 1 1 UJ 1 UJ 1 UJ lU LU UJ 1 UJ 1 LU 1 O 1 ro r^- r^- CO ro Oil UO UO to I 1 OJ E E CO r- CO 00 IXi OJ 2: 1 i _J i E ixi 5- El El Ijl IX DO

Ql 1 OJ iTi r-- Xi LO IX iXi El ro r- 1 I iXi OJ r-- ro ij; LO ^^- ro E UJ OJ ij-| CO 1 LO OJ iT-i Oj r- LiO ro El CO

\r \r ro ro ro ro ro ro ro ro >?i

El Ei E E E El iS El E El E E E O 1 E El lAi iJJ iTi OJ iXi E UO E lO

.:T i El iTi El E El El iM OJ ro ro

U^ I 1_L.« iJi CO i- iXi UO i ro lAj El iTl E

_J I E iJl iTi iJi iji iTl iji iji •Tl iTi ij'i CO CO

_J El El Ei E E E E E E B E E

5^^ j;

K ?^ >i 3-;

K ?; >iK

El E E E IE iE El E E E E IE E E L'T E in E UO E IR El UO E UO Gi E El lAi OJ roi ro UO no

133
01

1^

_J

LU .

U-

<X

ta: .,J «o J- U- •1

ft

0") t- ft =] X

tX LU

Qi 1-

z: LU> §

LUQi

hLU

tx

Ll_ O

§x ^ft

CO 01

LU

a; JO 1 i3 13 13 i3 13 13 i3 13 13 1 IS 13 i3 IS 13 13 13 13 i3 O 1 LU UJ LU (Jj UJ LU LiJ l_U U.! LU UJ LU

r-- iTi IT, 03 i-0 n".i —J I ro Ijl in i3 1J~1 ^- ro ro

ro iJr 13 iTi IJl U~i ro

r-- ro OD r- KD u"i 1* - i 'T- ? i r- ? 3 i3 Xi OJ r>- i'O LO LI <3 ro OJ CJ s ei 1 h- r-- ^- r-- r- r^- ^_ r-- 01 1 m iTi CTi m iT'i iTi CTi iTl iTi iTi iji

r-j 1 El iS 13 13 i3 El 13 13 13 13

El j3 E E 13 13 13 E E E El iS 13

z: 1 O i LU LU UJ UJ UJ LU ^

UJ LU JJJ UJ UJ UJ

i3 E E E i3 E 13 E E 13 13

-J i E> E E E 13 E E 13 E ;i E E E

_i 1 i3 E E 13 E E E E E E E E 1—' ! i3 E

;i; E E E E E E E E H 1 13 E E E E E 13 § E E E

El E •3 E E E 13 E E E E E ^ i 13 E i3 E E E E E E E § E E E E E El E E E E E E 13 E E

LU 1 ft i E E E E E E E E E El E E lE i 1 rr. i UJ UJ UJ UJ UJ UJ LU IjJ UJ UJ UJ UJ LU E E E E li-i E E E E E

<r 1 E E E E E E E i § E E E 1 _j 1 E E E E 13 E E E E E E E E 1 _j 1 E E El E E >S E E E E E E E E E E E E E E E E E E El E

fj") 1 1 r 1 E E E E i3 E E E E E E E E 15 E 13 13 E E E E E § E E E E E El i3 E E E E E E E E ! ct: 1 Pi t-j 1 E ro 0-1 IJ) IX) E iPi iXi ! ! 1 E iri E IJ") ID OD r- 10 1 0- 1 E r-- ITi I

iM iTt 03 r>- in 1 E iri iTi iT-i iTl 03 00 E o:i 03 1 _l 1 -J 1 E E E E E E E E E E E E 1 'X 1 U1 LU 1 o: 1 LU 1 h- 1 <L 1 ><: j« ?-S iZ 3< J« ^; J< 1 Ql. i E E E E IS E E E E IS E E 1 E in E \r> in E in E in fci in lO 1 a: 1 C) i iS E O-J i-^j PO ro iri 1X1 1 Ck: 1 CtL 1 UJ

134
CE

(-a 1 C5 2:

i_j CfCi >- ULO

\~

_J UJ n :X _j

U") UJ

Xa

u: UJCi c. o

Li-I UJ

s; UJ1—

3: Qi hlii UJ rj LU — H

LL U- S O ~ cn

-y UJ Cl X

UJ a: iz: o -a:

iS3 i3Zi i3 '3 Gi isii '."J li! '3

i2j ijZ' iS i3D i3 i3 (TT, CD (D 13

2: 1 O 1 UJ UJ UJ UJ IjJ UJ Ijj UJ UJ UJ Ijj U.' UJ Q CO IX. iTl r-- r-- ro ro i3Zi 03 ^ j 1 Oj I.JJ O'J in r-- OD r-- LD r-'i rj r'-j ._j 1 ro rn 3" >ji r-- iXi '£> r-- iTi 1X1 Ul iT, 'XI i!D rj o

03 U") IX fri CJ ^ i-Xi 'D3 0-1 C3

i- •Jl IX' C-J GO Ul r-- Ki IT' LTr

a 1 U 1 iTi iTi iDj OD 03 r- r- 1, r: 1. r. I.JJ

r-j 1 u:i

m LTi U": LTi in LTi Ul to IXj LT' CM 1 i3

iS 13 i3 El i3 *3 13 13 131 131 iS

CSj i3 13 i3 13 13 i3i 131 13 CD 13 13

i_> i UJ UJ UJ IJJ UJ UJ UJ UJ LU UJ UJ UJ LlI

iD3 UJ Ki iTi rv iTi in i.

M ro 03

_J 1 Tl iji LTi 01' J-i r-- 'Tl iTi 03 IXi iT; _1 1 Q >7D 03 1X1 U"' iN in iTi M r- ai •3 O.J r'3 ro PJ

IT) i3 03 ir ro i~i uo ro

iTi iTi Tl iTi 133 03 03 03 r-- OD on m 03 133 03 03 03 03 G~i 03 03

iJl 1?! IT. iTi iTl iXi iJ^ iTi iT. iTi a-. iTi iJi i3 i3 i3 13 13' 13 13 13 i3'

_i

<zu

UJ

UJ

t-

<I

o:o

a:

13 i3 i^' 13

C .1 13 i3 13 13 3 13

i3 liJ 13 13 13 iS CD 13 3 13 i3 15

UJ UJ UJ UJ UJ UJ UJ

u UJ UJ UJ lJ_l UJ

03 OJ u; r-- CJ r-_ 13 OJ iXi 03 i.Xi iTj ir.i ro r-^ ro 13 roi IX' in

iji US 13 Ul OJ LTi U; 1?' ro

IT) OJ 03 Lfi C.J 03 r-- ro iT u: OJ 13 3 13 iji 13 03 03

03 03 13 03 03 03 03 03 ^-

Ul L- 

iJi iT IT 1T1 iTi iT iT IT iT IT "U 1 iTl iTi iTl iTi iji IT iT iT U! Ij 1 iTi iT

13 13 i3 i3 3 13 131 13 13 13 13 i3

12 r>3 r^ iM 0"' r^ 1X1 r^- 13 IT tj3 13 ITj uo 'Xi OJ 03 r^- ro i\1 13 03 f- iri O-J IT m3 r-- LO ro i2 iT iT iji iTi iJi iT 03 03 03 03 03 03

i3 13 13 13 13 )3 13 13 13 13 13

?^ J4 ^2 *^ Jf ^^ 13 13 13 13 13 iS (3 Q 13 13 iS ITj 13 in 13 in 13 iTl 3 m 13 lTj iS

13 13 OJ OJ 1^3 ro UO i.;3

135
UJ

1

!

1

1

1 El El El El El 1^1

) IS E' 'S i3~i El E' El El El X I 0 1 UJ UJ LU LU LU LU LU LU LU UJ UJ UJ UJ

1—4 ) r—

1

r- '-£' IJJ on iTi IJ 1 E r-

_i i -,—1 r-- 0-J fj ^ El U'} r- ro OJ

_J 1 rn iM aN OJ ,—1 iXi ro r- XT CO i-i

C-l Oj LO IT! PO r- iXi 'Xi t- IjO in Ki ro rn ro ro ro xr

fj l-JIl Ef rv- Oj U .1 OJ iji

i3Z' 1 u"i r- r-- fs- i.£i iXi Ln LTi LO

rj OJ OJ PJ OJ OJ OJ OJ OJ OJ OJ OJ

oj i

1

E'

I

I

I

1

1

I 'IT' © Q E' El El El Ei El

iX) Ci E' El El El El El E

!2I ! 0 1 LlI LU LU U-l UJ LU U LU LU LU LU LLi LU

J—(

1 [VI iXi 'Xi OJ OJ lOJ -.—

t

r<; 0' 1 ^ ! r- LTI OJ IX OJ r- 03 ro

! f U") J Lj -1 f'O 0"! iXi 1x1 OJ m r- iT' h- LTi OJ r-- r-"..

1 'Ti iZD iTl OJ LT: 133 E' ro U .1 ^J i.£i W! U" f'~> OJ OJ El E' IJJ U" LT. LTi U"i LT. Lil in LO in \r

0:1 'Ti iTi iji IT; ij i iTi iTi iTi iTi C'l iTi cr.

IJJ CI' 0 El 0 isii 0 El El El Ei El

O

V-u

u_

LU

UJ

•X

cy. o

IXJ

13 ijt-i 0 El 13 13 El i3 E 13 13

El El El El El 13 E: El El El El i.iJ El

LU 1 UJ LU LU LU LU LU LU LU LU LU ixl LU LU

Ul Oj 0-J r-P; ro ro LO 0"i OJ LO E

X. 1 E' in Oil r- OJ OJ iXi ro so Tt- LTi ITi

i _J 1 13 13 r-- OJ iTl OJ OJ Ei CO iM

Qi i ! _J 1 u:i E' ro r- El OJ in on E 13

"1 i r-- i-Xi o.j Ol r- m ro 0.1 'El GO 'Xi O'l 1 ij 1 iTi n-| iJi CO 03 on on on Tin r^- rIJT UJ IJJ CO IJJ IJJ 0:1 Oj CD CO Oj GO CO

IJI iJi iTi IJl iTl iTi iTi iTi iTi iJi iTi iTl iTi

Ei El 13 El 13 13 £1 E' El El 13 13

13 ro r^- iM iTi IJj r^- Ei XTl un

El LT.! El !Xi OJ m r\- ro lO

13 on r-- LT' OJ iJi IT! 10 rn

(D iTi iTi iJi iJl lT| iTl on i5n on .0:1 on on

13 iS 3 13 El 13 El El El El E 13

a J* >; *<- (3 13 13 i3 13 13 (3 iB El 13 '3 13 3

Ci in 13 in (3 IT) E. in 3 m El in tS

<3 13 OJ OJ ri ro UO in

136
1 1^*1 Gil Gj 'Xi 1 <S} 'SI' •3 'Xt cii <33 Gil El

O i Ld laJ L'J l-U ixi ijj I.U lJul UJ U-i UJ UJ UJ r- r- C'-J r- CO r-j y-j _J i u-i r-- a;, 1. n i.£i 10 Tr U"i r-

\n r-- C'-.i O.J r-- yi '\r r<ii r-:i 1.13 r\- t'-> 01' h- OJ

r-- LTi o:« 10 ijii C..J IJ 1 CT; 03 in ro

i3 1 r-.j El OJ 1

i?-.J 1! Si i3Ii El ei lEi

UJ

El E' El El El iJi-i Ei El El El El El E \ El E' E' E' El El E' E E' El Ei Ei El

O ! UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ

Oil 1 j oi El El i.£i UO '£i r--- roi rn r- iT-| ! i r-- O-J ij'i ro E; ro El CD O-i iTi _J i ! ij'. OJ El iXi ro 03 CO cr-f roi bli in UJ '—1 ! i£i ro 1. "1 r-- ijD •xT vT U3 r-- LTi iTl 1—

U-' !il 1 bO El XT Oj OJ IX' iJi OJ in r>- iTi r<:i u_ r-j LO "t OJ El iTl r-- uo OJ Ei 03 r-..- LOi 1—

i UJ IJJ IJJ iXi r^- r- P'- (\. r- r-- i-O iXi i.£i .rr P

iLO Oil OJ IJJ 03 03 03 03 G3 CD 03 03 CO

cr _J UJ El El El E El El El El E' El = E E El

J- ! 1—1 I--I Ctl U_ o >

Ulj"j

•X

1-

— 1 1 IjJ 13 _j

i_0 UJ

Dc ilj El El El El El i~i El E' E El i3 'El

IZI E' El El El El El iS E' El Ei E E ( ! UJ ijj UJ UJ UJ UJ UJ UJ UJ IJJ UJ Ijj l£l UJ El i XT i£i iJi iXi El ro 10 r-- E El CO UJ OJ in iJl ro in ro ro •5 ro 03 r^- '-£' OJ X _J 1 El h- If-i m un i.£i r-- IT; ITi iTl ro i-£i Oi 1- 15 ._! 1 i.n Ei i-- iji i53 ITl iTi JS m i7l h- Di UJ _i Ul i.ri i.£i CJ l£i .Xi iTl If LU I'j'i iTi ij. El oil r^- r^- i.£i i.n U3 in XT r-i li- iX; 'X i.£i I.JII: l£! i.n i.£i i.O i.£i U3 '.£1 I.D t£i i.£i iTi iJi iTi iTi CT'i IJI iJi ijl iTi El ij, iji El U_ u. a: : t ' 1 El El E El El El El El El E El El

LU

i""i

X

1— UJ •x zi

fSi CO Ci (X

CIi UJ

a: III p_ i~l hi_1 El roi r-- OJ iTl i.£) r- E '.£1 'X El LTi El yi l£i OJ 03 sT ro Ei -o U_ El IT.; r-- u:i OJ iTl El r- in ro El iTi iji iTi iJ) iXi Ti CO 03 co 03 CO CO

QJ

_!

_J 1 'X

El E E El El El IS El El lEi El

t' "i 1 UJ I—

0£X 1 Jvi ^? J.? Ql ' E 133 E lis El Ei ei El (D El lE El 1 IS IJl El U3 El if.i El 'El LI El

a.El 1 i3D 133 OJ •"J ro r>3 \Xm i.£i

137
:zi uj O X i— 1-: i-^ LU ! 2:

isi <T>

a 'U.

LU j _^ ! CD &1 1 E" El El 1:^1 El Ei 5 ' LlI UJ LU 1 UJ 1 UJ 1 UJ 1 U-l 1 UJ 1 UJ UJ Ijj 1 UJ ) LlJ

i"^J LHi El i ' __i i r-l iTi Ki 'i' l-£! iaJ El <'L iTi ij-: r->- C-i r-- en 1! -J LT' r- CTi Ei 0} ro

jT'j i.n I--L' 1 "1 r- CJ

ro

n ^ LO r-- Ei El r--

:;+ Ijl ij i iTi El E Ei OJ C'-J

rj~' ! El l-_ UIi

m ro C'-.J C\ !

r-- Uj C5 'X' 'Xi i.ri u:i i£i '£1 'X: Ei El E' El El El El El

El

UJ

!£!

O-.j

UJ

El

i£i El

UJ

U_'

AiEl

rf<j

lii

UJ

r-- r-- ro

i£

r-j

IJ..1 El

El El E'

UJ UJ lU

i."J >Ti rj

rj

r-- E

iTi CTi

P-J r- Qj 1. f: fO

(J-. r-_ rv Ei Ei

El El ElEl

U-l Uj U.I

IX. f- ro

QJ U"i El iTi \r CO Qj

LTi rri Gj Uj ro Oj

r-- r~ r^l Ei El

1- 1 UJ i El E' i3 El Li-l 1^1 El Ei El ij_i M i E- El El IV, El E" El IS El El El El

Q El ! LiJ UJ 1 ! '21 \ UJ UJ Uj U_l UJ UJ Ixi UJ UJ UJ UJ Ui LU 1 I 1 f .J El i"-i Xi ro i£i PJ i£i CTi CO CJ Ui CO ir.i 0~i if. CTi UO r^- LH

1' i ! _J i 0"i 'Xi ij) [.- ro El To i£i nj ro cm F- i li: 1 i ._l 1 r^- iVi >-^ ijj P.I uo r^- Xi r-"i CO h- Ci UJ 1 1 } r-^ i"n ro Xi co ij> El UJ ij~i t iXi ro d CTi CTi Qj r-- 1x1 £K iX! |E 1 5-

ro fO ro ro ro

ifi iTi iji rr-i iji iTi iTi iT"! CTi iJl iCTi ij) CTi U_ |J_ £ 1 0 0 El E El 0 El El E El El El iS

LU

Ui

a:LUa i 15 ro r>- cm' r'^ 'Xi ^- E. CTi U~ •X 1 El U"i Ei LO i£i OJ CO r^- ro El u_ I El Oj r- UO rj Ijl r-- LO \r ro 1 0 iji iTi ifi CT-' CT1 m m m iTi ro n-i _!

_J El 13 El i3 El El El 13 El E E

<r 1 J;- >t E iS (D E IS 10 E El ilJ 1 E in E' E ITi Ci in E LO Ei in i3D 0 \t- ! iD i>J f'-J r^i ro in I'X

138
1 1 ; 1 r-H l3

.—1

'3Z' 1—

l3

'—^ iS

T-l GJ

'—1 i3 i3j 1 1 ~^ i i ilHi ' 1 ijj j Ll! 1 j iJJ 1 UJ IJJ 1 IJJ 1 loJ 1 LU ] IJJ 1 IJJ j LU ijj

|-- Oj c-.j C'J '3 >T, ^ I.JJ LT.i V" iM '3 \r> O'l r- i ^ ' Ijl (._

r--

r j Ol r- '£ N..

I-- r..„ !/l

Li' O'l r- f'C 'OJ rro Oj tn IJ-, r- i3 ro i iTD i ro CM '3 ai o;. irj ! i/J i iJl in '\r t 1 ir'-.J 1 i3j '3 i3 13 13 '2''

'3 i3i |3 '3

1^! i3 |3 '3

—.- i3' i3 1 '. i i3 i3 UJ 1^- 13 3 i-iZi 13 1 1 LU IJJ Ijj UJ LU IJ_1 UJ LU LU UJ I.U UJ UJ ' ' LT' L! .1 C-d i~ i?J 1. '-.! 'Xi ro Oil roi 13 roi (^^ _J 1 iTl '"•J i?J LTi I"-- IXi -J i i-X 1 —! ; ro iJJ IXi r- i3 LT.I IJJ IXi LU Qj C-J ro 3 ro 0-J •X! i3i ij~'i roi '>r 3i I'Oi LU iJ"J CO 3 iN n '-T IXJ "^r pr. 0-J 13

U. i >J LXi o'l ro

in

m LD roi ro ro 1~0 0-J n-i CE r^- r-- r'- r-l r- r,_ r- r-- r-- l--- t— V

CC _1 Lu i3 i3 '3 13 i3 13 3 i3

(=) _J o I—

rz; u. o

u. •b:

'iv en

1-_i UJ —t

•:X _j LU r ^ q; i— UJ '3 '3 i3 13 i3 i3 i3 CD 3i i3 GZi

i~J i3i '3 '3 3 Cj 3 i3 i3 CZi Ql LU .2- UJ UJ 1^ UJ LU UJ UJ |o LU LU UJ LU UJ UJ O 1 UJ CJ LO 'C 'J r-- O-J roi o:i Oj IJ) LU l3! in IJJ fv. Ll" 'D in iTi OJ OD C-J P'- -J ! i3 'C "$' in 10. r-'-i ro OJ Oj C-i LCi ct F CiC i r- ^ i.D i.£i "7 i3 LD i.n iM r-- 1- I.U 3 0-1 3 iji IJ'.i rn 13 LU *—

IX; r>- i.£i IX) ro OJ iJl on r--- iXi Ul roi Ci i?j 0-1 0-J O-J

iTi 1T1 iTi iTi iTi iTl iJi i7i iTi iTi iJl u_ o :3 13 i3 i3 i3 3 iS 13 '3 13 i3Zi i3 •3 i3

iJT UJ Z3 y. 1- a •-' UJ CO CO a ! O 1 IS ro r-- 0-J iXi i-D iTi •X 1 i3 ID i3 Lfi i-D OJ ro |\. ro

Lu 1 i3 r-- IXi OJ iTi Oj i.n ro 1 d iTi iji iTi iTi iTi iXi in o:i Oj 13 Oj

_J

_l 13 i3 i3 13 i3 •3 i3 i3 i3 i3 i3

}-i K' ?<•' .>2 -K 1 i3 i3 lE iSi iSi i3 13 13 IS i3 3 1 IS Ln IS ITl iS IXi 13 X) 13 LO 13 tn El '

i3 13 iM 1^! ro \t LO uo

139
2:

s g j:- -w i

^

I— uj' Lu :e:

Ll. Lu Qi O ' ' I 1:0

UJ '.T x:

to CO « 'I

! (—

j

iTTi iS i~ iS

1 } 1 1 1 lL k

iL UJ LU Ix! ijj lL LLi UJ

rn l?-J iTi |--_ 1~\ Xi

_i i r- ro IjI 0:1 0"i IJj ^ IX i>.i _i i Li"! ^ r- ro 1?-J 1x1 X C'-:- uri C'.J ro Qj iJl iJ-l IS IX vr ro M

1

LO r-- IJi

'XI r>j CO i.X C-J CC G3 0-1

iT-i CO 03 r- r-- Xi iXi IXi Ul

'# oj 1 (Vi r-j e-j e-j r-J Cm C-i O-.J e-j i.".J O-.i I-.J IS iS 13 IS Q iS IS iS IS IS IS

IS iSi IS IS iS IS iS IS IS iS IS > IS .3

IS iS IS IS IS s O IS 13 iS IS IS! IS D ! LU LU LU LU lil UJ LU LU LU UJ UJ ^ LiT fi in l."J 00 CM iTi XI IJl -J i n;i on UJ iXi ro IS IS OJ IJl o,"-.

i r- XI U"i 0-J IJl U"i Xi iS ro \r> r-- LH ^ IS ^ LTI 00 r-- IJJ IX> LlJ r \ iJi •5- co O.J IX iTi 0-J U"i r-- cr. ro

r-j 1"

; i7i UT Oi IS v r-- ro Ij- X' Oj CO ^ 1 '?i IS IS IS IJI iTi CO Oj CO r--

U'.l IX Xi Xi x IX Xi x- IJ'I Ln LO LTi iX

LLi IS iS IS iS IS IS IS 13 s IS IS LS IS

EC

IS 13 i3 IS 13 13 13 IS 13 13 i3 13 13

13 13 iS iS 13 iS 13 iS •3 iS 13 13 13 i y 1

i 2: 1 LU LU LU IX IX LU LU LU Ixi LU Ixi 1

1 l_l 1 Oj iS 03 iS Xi IJi lAi IJl ^

:X ! IS iS IX IS IJi 03 iS IS % uo OJ ! Z 1 1 _J i iTi IX U3 LTi r-- 0? IS OJ OJ IS i-X i7l iji i

1 —1 1 Oj 1X1 ro OJ Oj OJ 0-J ro ro IS ^ 1

1 t OJ LO 03 OJ r"3 LO IX! r^- r- 1'-- i-X ! CO 1

! ^ ^ Ij) r-- U3 % 0-J s 03 IXI OJ iS

'Xi 10 XI 'X i-X I-X LO in LOi LO LO ^ ! 03 CO iXi 03 03 03 03 03 03 03 03 03 03 1 iS IS iS iS IS 13 iS iS iS IS is IS IS 1

1 0 1 13 ro r-- OJ iJi r-- I-X r-- IS iTi Xi

! -rL i 13 LTi 13 \p i-X OJ 0": rv ro IS CD 1 \ LL 1 13 IV in O.J %

iT. r--- ro

1

i _J

1 15 % iTi iji iTi iji 03 03 CO 03

1 _J iS IS 3 IS. i3 13 13 13 13 13 13 13

1 c

1

i u

1 ixi 1— 1 &;

i ^

1 J-J ;-4 J-S J-J J-i J-S •A

1 li: 1 IS IS iS iS 3 13 13 iTi IS iS 13 3 IS

1 13 LTI 'S LO IS 1X1 3 IJO 13 !Xi IS LiO IS

1 g 13 OJ 0-J ro r<3 A?- m LO l-U

1 ai

1 111

1 LU

140
g

h-

:XP>

Ql: I LL.

0:1

I-- d

to

LU

>1

LU

2:

2:g

LU

LU'm !

:z:

ll. a:

0:1

<— lu

x 2:

O'l 01 'I

LUDJ3

CO 1.

J

_ , '- -J - _

1. '-J 1. -J 1 'J Ei iXi •nil 'X' El i ! 1 1 ! 1 i 1 i 1 1 1 1 :_j 1 IJ.! Ijj IjJ LU l-ij txl I-iJ iJJ UJ txi UJ ' 1 'JT' 0 ' LT'i J

1"'"" 'M L' 1 1 ro 04 0--J IJ~i t IJJ "^r l-:J _J i 13 QD r-j 5- iji r- Ul iXi 1J-! GJ 1..0 ro iji iTl cr-i Cl r- z: 1 iXi i£i ro iji iTi El ro '.jj El i.jj C-J El ijl LT" ro C-J C'-j E IJV iji CJ 1 on un ir.t '#

ro i?-j lEi iji onK ij:i C'J 1 r- r-- r-- !- r-- r-- Xi I.J3 1x1 XI ID

'?•' 1 Ki 0 IS Ei :Ei El IS El E E

i_^i iA.1 1^1 Lj-l 1^1 1^1 Ijj i^J t-\.i |J:J 1X1 El El ijJ '3 1^1 E E' E/ E' 1 ! 1 ix] ;Jj 1 . . 1.1 

UJ LU LU LU

f'.l U) 0-J iJ-i Jl E' G"l _J '. 0:1 !- Ijl r- ro r- on r-'- ro _i I iTi El r>.- "Xi ro

r-,.

Q Wt iTi 1J1 Li:i CO LO ro

p 1 UJ 11 ; iS CO !.£' tn ro CM IJl on r-- Xi LO

f-.J OJ i7l in 0.1 iTl ijj ro 1X1 ro Ei r>-. \r i iS iji iT"; O'l CO Oj on on r--- r-- r- Xi Xi

1.0 ro ."'•! Cm 0-.i CM OJ C-j OJ Oj CJ CJ 1?-,!

LU 13

d El iS El El lEi E. Ei El El El E

._i

Li:

Q.-: LU

UJ 1 E El El El El E El El El E El El El

C-1 1 El E El El El El El Ei El El E on E ^ 1 1 2; ; UJ UJ UJ lU UJ UJ UJ UJ LU U.1 LJ UJ UJ ! 0 1 r-- iXi I--. 1x1 on at ro 1X1 1 ' 'I iTi ro 1 C-J IX r- ro 0.1 U*i i

iXi on 0 i El z; 1 1 _i i ro ro r- 1

r<" El 1X1 E

Cti 1 1 _j 1 on O-J ro E IX' 'D IJl LTi 1 I .Tl on O-i iXi Ij-l OJ ITi r^- El r-in L n 1 1 r ! E. r^- r-n E 1x1 CJ IJl ir.i on E

rci ro C-.J 0.1 C-.J El El lEi iTi i7-| ij i 10 1x1 IX Xi iXi 'XI iXi iXi iXi IX LT) LO Ul El El El E El El El El El El El E E

r_i ! El ro IV iM iTi Xi E iTi 1.D

•;X 1 El LO El ICl IX iM on r-. !0 El

LU i Gi on r^- IXi CJ iji on r^- LO ro 1 El 1J1 iT' ij1 iTi iTi iri on on co on on on

_J

_J E El El E E El El El El El El El

it 5-i ^? TfS ;s >t

K ?£ 5;; 5; J-i ?i El El El E El E El E 13 E- El E E

El LO El in Si U"i E' in El LTi E 1X1 E

El El CJ

C i ro i'Ti 1X1 U" Xi

141
ina

_i

LULl

tX >

<I

Ja >

Li- •a: enH

•X to

LU

X1-O

LlJ

r

Li

XH

h- <x uj

LU CD SH

LL Or:

aO XI(n

UJ

OX hQ

1X1 <L

X

UJ

LUX

ct: X

'"J O.J p. 1 p

J

j-I. j p. 1 iX iX (X X' 1^; 'X XI X: i 1 1 ( 1 1 1 ] 1 1 1 O 1 LJJ ijj LL) LU LU LU loJ UJ LU LU LU LU UJ

j-T-| \j _1 1 m 1. n LTi iXi 'XI 'X' IX

CM ID iTi iTi C'-J Li:i u":i iX JTi 'Xi |J""| U" U .1 U" Z- ' iXi ft. tXi I.XI 'Xi V- iTi OJ U~i iJ": '^

iTi LfJ r\- i-iJ 'XI iTi ro Uj iXi iX

iX) LTi fj

X

CM 1 XT 'J ^ \r iX Q Xi Xi iX iSIi x IX iX tX

XI

X

xX X'X

X XiX ljt.1X

IX

X iX

XX

Xx

X 'XI IX iX

Q 1 LU LU LU LU LU LU LU lU LU LU UJ LU UJ

rvX

m XiX

xX r._ r-- OJ m i\- OJ iXi iTi ro r-j i.n 00 Xi OJ r^* Ij 1 fvi i-X X iTi C-J X X iTi LO x X ro r--- r~i X x xl- ro LTj iX

LU ro

X \r Xi X' r--

X uo

M iX rs- in OJ

X iXXm

X in ro 1 X X X X iTi X Xi CO Oj Oj

X

01 r-j IM C-: OJ

LU G3

X iX

xxXXX

X

X XiXX

<r(J

LU

<x

a:o

a:

UJ

IJll ii.1

XXX

X XiXXX X'XX

XI

XXX

X

XXXXX fXXX Z 1 LU LU IXI lU LU u LU LU LU lU UJ LU LU X i OJ in X Oj x X iaJ t^l OJ X X X l£l X r-'- iTl rji r-j r>-

^3- _J i in IX Q-J Xi roi r^ x r-o X

_l 1 in Tv. r-- '.D Ol

XXX r^X OJ

iM \r U3

XX OJ roi in

X r-- r-^ iTj IX) OJ 03 rv. ro iTi \r\ ro X X X X iTi X X IX X rv. r^- X *—' 1 in IT' in in in '7 VJ- X X X X iX X X X X X X X X X lO i%j X r\- X r^- X iTi x x in IS in x OJ X

i3

X in OJX on r-w

X ro

X cn C'l

X

X

XX o:i 03XX

©

XXXXXXX

X

XXX

5^* J4 >* X X X X X X X Xi

XX

XXX

X ITl

X inXX

X in

XXXX UJ

X

© CM OJ ro ro XfX

X

X

142
I

133 1 1

iHi1iHi iXi '^1 i33i 1 Ei i 1 1 O i 1 UJ IJJ UJ 1 UJ UJ 1 UJ 1 U 1 1 UJ 1 Uj 1 UJ ill UJ Uj ! 01 'Sj U'l xT '£' 1?J lilT' U 1 IJl ro ijZi ro S ' in !- r^- iXi iji xT 1. ri ^ 1J3 iji _l _J 1 El <Ti '£i ro ro 1.13 ij'i iTi r-- 1 LLI 1—1 j lili Oj m IJJ rn IT' 03 03 in iTi '3"i r-- 1 1 LU kD vT fj ro 3f i-Jli IJJ in ij 1 |j"i E' 1 Li_ rVt f. '--J i.ri on i"J xT r-- iTi "T

o:i f'- iri ?f ro rg IJl IJJ 1 <X i C'~' in in IT' in Lj'j in UT LO ir> ij"i XT 1 i

> 1 ct: ._! 1 1 LU di '3 'Sj i3Zi '3 '33' ijZ' IX' 1

UJ

O

DC

an

LU

i3J CJI UJ

Ti

rv.

r-- ro I lij

'.jj Ti

03

i.n CJ

i3J '3I UJT

r>-

'X' 03

'X' I UJ

Ij'i

'33'

133

'Ti

'S.I G1 1 UJ I UJ

iTi U .1

roi I U.I

Uj

'33

rri I UJ

iji

iTi

ij I lT| r-Qj

iTi

IXI

IJ'I El E' Ci Gi

PO

XT

rr-- ro

fX:

iji

P.J

iJi

1- 1 Ul 1 El E' ijj 1331 El E '.iu.' 133 El El 133 El 1 El El iS El El El E E' El E El

LU

r i UJ 1 ( !ZI 1 Ixl LU UJ UJ . ^ UJ UJ UJ UJ LU IXl ixl lU 1 i33 1 03 03 Lfj E' r^- IX r>- i3J uo \\- iTi LU I 1 LO 03 El ro 'Xj OJ ro IfJ iTi r-- X 1 1 _J 1 ^ iTi 03 ro 03 iXi iji til 1- 1 Ll:' i 1 .-1 1 iTi 'Ti El 03 i.n IXi r^- 03i IX y- Ui UJ 1 _i 1 rn Ln rs- r- 03 Go ro El

LU 1J3 1 (>- LTi ro Ei U3 r-o iji i.£i CM Ei

IXi •! 1 23 1 Ui iTi Ti iTi 03 UJ 1X1 03 r-- r*- r-- rx- 1'-

ll. U,

Q: 1 O "I 1 151 El El Ei E El El Ei El Ei Ei Ei r 1 1 i3D ro r\- OJ iTl r- IX E 1X1 :I 1 IX) Lfi |V, IX) 'X' iM IJJ r-- ro

U- 1 E.

m r'- in n.i iJl 03 r-- Li" ro

_1 1 E iJi iji iTi iJi iTi ij3 ij3 03 03 03 03'

-J E E 13 El El E E El E E' El X 1 v >:> >s 5.-> 5^:^ 3^:^ Ci 1 133 Ei El E E E E E E E E 1 El ID E in El UO E in E LTi E in E

QC

i_i i El E fj iM ro ro UO U~i XI

143
11

I— 'X 'X' '-^' Li..! 'X i-i.-' iX 1 •3j iX) 'X iX 'Xi 'Xf 'X 'X' 'Xi iXi I ^ 1 O i L-J iJJ UJ Ijj UJ UJ UJ UJ IJJ UJ !jJ 1 ' \

',

J 'Xi 'T'l 'Ti iITi 'T'l 3

IJJ 03 ! ! i 'Tl 0*1 0*' '33 ^* 1'- U 1 P-- 1 _i 1 ^r f- JJJ iJj % >T: 03 133 T'- ".£1 lH i 0-4 Oj r^- i.j"i U"' ^ rvi '"^J <Lj i k: 1 ? ro ro ro rri r'3 r-^3 rn

rJ". Cr-i ^S^ >ji 1J1 "Tj iji iT. iji 'Ti 'Tl 1 Gl! 1 ijt 'Ti ij-i iXi iji iji tji IT. iTl 1 C'-J 1 OJ !

|J1 IT| iji iji iTi '7. iTi 'Jl iji 'Ji iji 'Ti iTi 1 - 1

uj IX iX iXi iS 'X 'X IX 'X (Xi 'X t {

'5J IX IJ..1 'i.1 iXi 1 ^ ! 1 I 1 IJJ U.i IJJ LU IJJ UJ UJ UJ Uj UJ UJ UJ 1 LfJ '3 L^' 'X' iX' 'X' 'X iX 'X 'X 'Xi >X 1 t5 —I ! I3 i3Z" '3 iX' iX iX §

iX; iX 'X iX GZi iX ) 1 1 I '33 '3Z'

(7-1

'-il.' •-ij •-iu- 'AJ iX IX 1^ 'X ! 'ID 'X' iX jx *x iX) iX CD iX iX iXi iX I r t IS) iX IX IX 'X IX IX "X» 'X iXi iX f rj 'ZD 'Sj 'Xi 'Xi 'X iX fX (X iX iX li-l iX 1 > © El 'X iXi iX iX 'X iX iXf IX iX' iX 1 iXr — \'-* ! 'i- Ca 1-3 LE

iT"i 'X 'X"

2:

Ll j o

UN 1 <n f- L ~7- :

=1

r

LLl j! CO 1

LlI ^ . . L..I Ll! t—I

'X' 'Xi 'X '_..' l_iJ IX I—

IJ.." IX' iX ! LU 1 1 1 —r- LJJ LU UJ UJ UJ UJ UJ UJ UJ UJ Uj uj 1 -> — J- '—' ] 'X 'Xi iX 1X1 tX iX' %

'X 'X' •X 'X' 1 !-U ?

GZ' 'X iX iXi 'X 'X' 'X' iXi •Xi 'X 1 ^ I ^- ,1 1 1?,

'X' 'X 'X'

;ii 'X •X iX jX' tXi iX 'X 1 Ltl 1

1 1 'X' iX iji.1 'X' iX •X' 'X tXi tX iX' 1 1 GI' 'X' 'X 'X •X'

l?l •x l-ij fX' iXi iXi iX 1 LU _r

'JJ 1 ^ \ 'Xi 'X' iS 'X' iX' lA.' 'X 'S iX' 'X 'X' iX I Jd. CD 'X X- 'X 'S iX *X' iS 'X ^s iX 'X' iX 'X !

LL. !J- Ol. O O 3 j 13 IX' iXi

d IX »x iS 'X iS 'X' iX^ iXt iX i _ CO

L—' 7', 1 f—1 *

' iLi 'tX. ^

tTi 0"J

O 'I 1—t

LU

IX q;

Cl. o i 1-u 1 i3

— ^- OJ iTt r-- iX iTi '03 1 « <T I El in •X ITi *-D 0_i T-H !- iX 1 ul IS QJ r-- ir.i OJ Tf 0:1 N- Lfi rvi 1 CO _) 1 IS iTi iTi 'Dj OD '33 133 1

(U

_J

<I j ^ iX' fX Cl 'X IX IS iXi iS 'X iS IX IX 1 u [o LU [ fO Qi 1

UJ jj

t-

<I >5 ->S 1 Q£ O tX •X iX g

iX •X'

X iX iX 1

ir.i in IX LP iX in IX IT' iX i 0^O Cl '?vj LO in 'XI 1 1 Oi 1 &:

UJ

144
01

(=! -JUl

U- >

cr •a: i~ ft en

LiC D

Ll.

(.n

_J i—

—1 t;

(7) Ul

Qi<E

UJ UJ >-

UJ

a: q: t- fLLl d; m 'I

J- Ll u li: o

2:D

X

tn on

Qx

UJ

ck' 1 1 ; 1 I t i 1 1 I 1 1 1 t t J 1 J i3 ihi i_^' El El El E E' E t ! I ! J 1 J -7^ I IS iS iH' El El El El E 1 1 1 i:^' i UJ UJ UJ U-l UJ UJ UJ UJ UJ UJ UJ Ul UJ

iZZ' iXi ro i!ICi iTi UIi LT; IJl \ _J 1 IV i3 -7 OT OJ 0"! OJ Oj i _J 1 UJ \r. O-J iJi El LQ 'JJ El 1

O-J Ci r-- rc Oj OJ V- ro 'X' <x LTi m E o3 LTi O-J Ln ro ro fO OJ O'-J OJ 1 i CO UJ o:i UJ o:i iXi o:i iID Oj Oj t CM 1 1 CM 1

IJl Ul IJl Ijl G"1 CTi iTi iTi ij] 0"i 1 i 1 1 1 1

El iSIi IS iS El E E' E' El 1 1 1 1 ] 1 1 1 1 ! 1 1 1 1[111 iS El iQ IS El El El El (—! E' El E t 1 1 ijZi iJD E El El E' P) El E ! 1 X \ i 1 '_' 1 UJ UJ UJ UJ UJ UJ UJ UJ UJ LU UJ UJ Ul t 1

'?-! t - U .1 Ln P- LO El i.'-J IJJ ro

!Ij i h- IJ IT; ijj i.£i E iJIi ~|

i-£i Oj

LiT Pv.U 1 irj r^ i>J E' ro Oj ro 1—' 1 Ij-J ro 10 ro OJ E E 1 1 LU r>- r-- 1'- r^- r-- r-- r- r>- i- ! i r-vj iTl iji iri ij". |T1 iji iTi U 1 m

Ji iTi iTi ij-i

u CTi

U 1 iTi ij"' iji IT. IT!

ij^ iji U'l U'l iTi IT. ji iTl ITi iTi iXi iTi 1 1 UJ iXi iS 1.U El E E E El El E

OJU i UJ 1 E E El El E E E El E E Ei

Cl 1 E lii El E' El E E E Ei E E

UJ 1 Ul Ul Ul UJ UJ Ul LU UJ IJJ U! LU Ul IJJ T~ j 1 iw-i 1 E iJJ E i.'^-J O.j r-- OJ Ln 0 1 i.£i Cl 1 OJ i7i 'XI r-- Oj Ul E IA.1 1 ._) 1 E ITi Cj r- Ui LOi ^ ro OJ El

Ql 1 1 _1 1 I.O LTi Ln \n in in (JO LTI ij:i LO IJO Ln

m ' El 1 Tl iTi ITi iT, iTl iTi iTl iTi iTi iTi U 1 Ul Ul 1 O") 1 ; X. i Ul iTi iTi iT; iTi iTi Ul iTi Ul Q\ Ul Ul 1 iTi iTi iTi IT, Ul iTi iTi iJl iji iTi Ul Ul Ul 1 Ul iTi iTi Ul iTi iTi Ul iTl Ul Ul Ul Ul Ul 1 E El E El E E El E Ei El 1 I—'- 1 E roi IV OJ Ul rv 'Xi i:iw' Ul 1x1 1 rr I LO El iXi OJ Qj r- ro 1 U 1 E Oj ini OJ Ul ijj f^- in \r rri 00 1 _l 1 El U: Ul Ul Ul Ul Oj E Oj UJ Oj " OD

<u El E E E E E El E E E E E 1 S 1 JD i U 1 fO 1 LU 1 h- 1 ll-: i 1 LU 1 1 1- 1 i a: 1 5^2 ^s 1 ct: 1 E iTi E El lE E E iS E E E 1^1 ivi E \r> E in E LD E ITi lE LTi E ioi E 1 ii- 1 1 '"I 1 E El OJ i\! in in LO 1 ct: 1 1 \yL \ 1 Ul 1

145
to

_J

LU

Ll. vX

Ia:

q:o

Lu

Ct:

a:F

;z: r

•I

LU

2:

lj_ Qi o :zi

ij") o V i- o

LU S

,r< (=i •—I

UJo

CO

O)

IS El El El li.i E Ei IJiJ El iji-i El El

Si El E" E li-i El El El E( iTl El I 1 ! 0 i LU UJ LU LU y LU LU LU LU 1 -""^ 1 01: OJ '' ' CO 1. 'J OJ : _j ; l-T! 'IT' ilO UJ Ei iTi 'D roi r--- Ll .1 CM

^- i _! i '. - .1 1'- CD ro ro CO 1.0 r- fVJ IT,

cvi r--j iTi OJ r-:i ro E iXi r-:

H ; I.D Oil iTi C-i \r LTi iXi r- CO 1

iM Ci CO r-- iXi ro

rr. : 4f i ro ro r-j ro ro ro ro

1"J 1 iTi iTi iTi iTl 1T1 iTi Li'i iTi iTi CTl Ci

C'.; i —- i

Si Gi G'. El El E E Ei El El El El

13 El El iji-i El El E El El Ei E El

El •E El E iE El El ij^i E E Ei El

:z: ! 0 i LU UJ LU LU LU LU LU Lu LU LU LU

iJi U" CO CO OJ iTi iTi Ei OJ

_; 1 IT. iJi 11:1 ro CO UO IT: iTi : ' .1 1 1 0-i r-- El f'--- El OJ 'Xi r-w CO iTi iTi ' ' ! 'B f'.i CT- OJ •JJ ''J rj iZTi Oj iXi "T

IJJH 1 'T< iTi IT] iTi 0:. 00 iX^ Oj CO Oj r- r- r--

r-j CO CO CO CO iXi CO CO 00 CO CO OJ 00 CEi ^ ! iTi iTi iTi iTi lTi iTi IT:- IT: iTl U 1 iTi CTl

O'.i iTi IT, iTi iTi o-' CT, cr> iTv IT, iTi en iTi Ui

!jj 3 E El El E E El El El El El El

_J

Ijj

— 1 _!

1—

J

i_j LU ei IS i3 El Ei El E E' El El El El iT: El iS El E E El iJD El Ei E' Ei El E- H 1 LU iJJ LU LU LU LU LU LU LU LU LU LU IJJ %

1_! 1 CO 0"; El <<:i 0"i U"i

r

,'

ITi fv- if, El 0"i xr El LlO iTi OJ ] j 'Xi T'^'i Ln E 1 n C'J jTi r<"i Oj

_1 1 'Xi i.n Ln U"i ^ ro ro c"j OJ

r^- ^- r- r- r- r- r- r- rCO £ 1 ji IT1 iTi iTi T iTi iTi iTi iTi IT iTi iji

iTi iT\ iTi iTi iTi iTi IT; CTl iTl iTi cr* IJI lT|

iTi iTi iTi iTi iTl IJI iT. iTi iTi IT Oi iji iTi d i3 El E El E El El El El El El El

IE1

LU

Qi. r

"1 1 E rTi r^- 0.1 IJI r^ i.D ^- Ei iTi KO

:l 1 El IJO El LTi

D OJ iTl Tj- r- ro

Ll 1 Gi 0:1 f- LO -T iM ITl CO 1 El iTl Cr-| iTi iTi iT iTi Oj CO Oj CO 00

-1

_l E El 13 E Q E El El E Ei El Ei

•X ! S-i J-i « >i it

a J-S « 5i ?4

111 1 El El Ei E El E CD El Ei IS iTl El El 1 ip UT E ij- Q LO E LO El uo El LD El

lj£

i_i 1 E El OJ (Vi roi ro t Ll

m

146
—

—11 — . _ . _ !' 'X' 'X '3 El El 1 Ci 13 IX tX '3 Ei 13

C i UJ Ui LLl UJ LU ixl U.I LLl LLl !JJ IJJ liJ U!

03 i?-J 1.

n iXi r-- C.J

J ( \T

W <;r I'O rvj LO ij'i _J i ro in 1,0 '£ W Q-J rxi

t' 1 L"i [_r; r-i 1 rj 1 n

'£i f--

w IJ'. Ijl 0' ; on I-- T- c'l in M iT'i p'- !2 Ul IJ~j GJ 1 ij-i U" in \r in 1-0 ro

OJ 1 CO ijD Oj CO Oj OD Oj o:j Oj OJ Oj Oi 1 'X' i3 i3 »X' 13 El El El El o

h-u

T.

U-Iu

LU

UJ

IccO

HiLU I11 _13 i_i_ El

ft'. '3

El lA-i 1.^1 ' 

'3 13 13 13 13 13 3!

O I LU UJ UJ UJ 1 1 LU 1 r 1 UJ LU 13 LU Ixl 13 LU LO !

IJ'I ]\_ ],_ 'X' p._ & 1 1 Ki T'i •\r ir.i Ijfi iC 13 Ij-j ifi _l i Uj Ul O-J O'-J Ul oj '3 UJ CO r<"i OJ •5 Ul IT; 13 m "''I [1- 1^1 UJ i3 Ijl Ul i3 Oj 1"'- 13 13 in uo

LL. 1^ iXi i.£i 'O 'Xi 'X) 'Xi 'X' l.O 1x1 1, r, i.ri 13

>- 1 '^r 1 U 1 IT) Ul Ul Ul Ul Ul ifi Ul Ul o"""i ijl iji •E I 1 ijj 0 ! iji Ul Ul Ul Ul Ul Ul Ul O'l IJ'I Ul h- ft i LU El i3 El E' El El El 13 El 13 I—!

ft ! _J

7- j o

a: 1 U. X i CO 1- 1 1— 2: i O 1 UJ z5 r 1 -J in

LU 1—1 i UJ El i3 El 13 i3 13 El 13 El El 13

'X 1 ft El E' E' E' i3 El El 13 E" El ft UJ 1 Ijj >; i UJ UJ UJ UJ IJJ IJJ Ix! Ixl IX UJ Ijj Ixl Ixl Ix' i3 ! ro r-'- Ul UJ OJ OJ in 13 10 Xi ir.i LU Ul O-i 13 Ul ij'l 'Xi OJ

T. i _J 1 iJ-i ro 3 i"l~; 'JD H 1 tx _J 1 Oj LTi OJ E Ul i-_ IJJ 13 ro

1- |V LU 1 t C-J CJ c'-i C-..I OJ llj OJ 0-J

Lli CO Ij-I Ul iTi Ul iji Ul U' Ul Ul Ul 0"1 U| Ul

CD 'T. i iTi iji Ul Ul Ul Ul 01 Ul Ul Ul Ul Ul Ul

z: I Ul U1 Ul Ul Ul Ul IJl Ul Ul L' 1 Ul u_ U_ 111 ! 13 E E ro r- 0>i Ul h- 1.JO 1--, 13 'J- Ul

El 13 1/! 1 0 l"J Qj ro IV

El 13 13 OJ Ul O'l 13 roi IS Ul Ul Ul Ul Ul iTl 13 13 13 13 on 13

13 13 El El E 13 Oj El

5i 3-S 5<i: J,? 13 El E 13 iS El El iS 13 El 13 13 U'j IS LTi LO IS 13 13 13 13 13 IS

El '3 '.'•J roi ro i i 13 13 IX147
I

_J

Ul

Ll_ cr

i~

ix

Cti o

LU

Lt>

UJ

ILI

Cii

V

Clnr

iil X1-Qi iJJ

iXl -I

',1. tyi o ~

CO r5 I— .- 

LiX ."T CO 0"! ft •X

LU

Q_

a; 00

J3

UJ

iS5 iS ' [-. 1 iS ^ ] IS is IS IS IS IS IS IS di Gi s IS IS O 1 LiJ \Aj l-U UJ U-l I_L1 UJ UJ I'J U-i 1^

r- 0"-. 0:1 0:1 Iji ro 1X1 iS

_J 1 ro 'Xi CO

'4 IS -J r- . '! iS

..J 1 J! LTi iJD r-j LTi L.O !S LO KO 0:1 1X1 'J" CO r-- ij"' SI i un Ul! 1

I-J3 03 IS •.•j

n ro !<1 •M

CJ iTi r- Oj rn iS. r-- I

CD

El i r-s- !-JJ l£l u-.i L' ^ hi

O-J 1 r-- r-- r-- r- r>- r- r- r- r- r-- r- rCJ 1 iSIi i3 Ci iS iS 13 iS' iS & iS iS iS

IS IS iS iS s iS iS iS Gi s G IS

iS IS IS iS IS IS 'Si IS Gi IS s

7Z 1 i : 1 m Uj U-i UJ UJ UJ Ixi UJ UJ U_! LU LU LU

'£1 iS Ti U"i rci CO ijl! Cj r-- >Jj _J i Ul •^r i.£i C'-.J iS iTi IS C-J i tn

_l 1 Tj- IS LTi IJl iS IT! LTi iTi CJ l."l Ul IS i?j ro rn Xj- LO r 1 r-- 1

Ul ro ro 0-1 0"i Oj 1X1 •^r {<-.< ro ro ro 1 Ijl Ul iji >T-| iTi iji CTi lit iTi iTi IT. 1J1 ij'i Ul :Ji iTi CTi CTi iJi iJi iT; iTl IS iS iS IS IS IS IS !S S iS IS IS G

u

LU 1 IS iS iS Gi IS

G IS IS iS IS Gi 0 0 1 IS iS IS G •s IS G IS ® IS IS IS iS ^ i 1 X I UJ LiJ UJ UJ UJ Ixi UJ LU UJ Lu ! Q 1 ro OJ ro LH C'.j ro 03 OJ X 1 i>-.i in Oj Ul uo r- \r !

r-- <'- 2: i 1 _J 1 -r ro CJ iT. f- 1

ro

SJL 1 i _J 1 iTi r-- LTi ro CO Xi CJ S 1 iXi Xi •D iX \ri 1x1 tXi LO ^1 01 i ! ^ ' co Oj n;i CO Gj CO 03 OJ 03 03 03 CO 03 Ul Ul Ul Ul Ul Ul Ul U Ul Ui iT; Ul Ul Ul Ul u. Ul Ul Ui Ul Ti 0"1 iTl Ul Ul

iS Gi Gi Gi IS iS IS

G iS Gi Gi GiG

U ! iS ro O.J Ul l£i IS Ul 1.0 T. 1 G IXl Gi in X: OJ 03 r-- ro iS

U. 1 G CO Cj U. r--- 1x1 ro 1 G U1 Ul Ui Ul Ul Ul 03 CO 03 CO 03 03

_J

_l 1 >s -1-1 Gi 13 G iS Gi G Gi IS G G iS

J« 54 3-i 2t

Q iS

G ISG

G ISGG Gi IS IS

G

G

G IT:GG in IE inG tnG

iS Gi C-i CJ r-o r-3 IXl uo 1.0

148
UJ

Ll.

tct:

2^

ixi cx to ixi a

x

LU

CL

00

ij3

LU

Q El El E g:i Ei El El El El El

El E El El El Ei El El Ei c:i g:i El CD 1 O 1 |J_I liJ UJ LU LU UJ Ul Ui U.! Ixi

'.n rci r- iTi ^ E: IT; r- El

.-J ' f-J Uj i"j r- Ti i.Jli lO Ei r-j CJ

...J 1 ro CO r-J i"n iX' r-J ijj in r- El

CO CO ij^i iJi IT- iV '.£> i"~J Id LTi ' .0 'Z \ r-_ '.£: U-J O-i i.ij rci E Cvj C-i CO Ln l?-J iITi L] .*' O-j iT'i i-i!' '-J 'I*"'! LT!' 12 1 El El ij- m lTi o:. iX. Oj r- r-- r-- r- r-- r- h- '.£i lij 'Xi ijj •Xi i.ij iXi i-£i iXi

0--J i

-- :

Ei Ei Ei El El El El El IS El El E:

Gi El El El El El El El El El El El

C' E E: g:i Ei El E El Ei E El El E t Cj ! LU Uj UJ LU LU Uj LU LU U.I LU UJ U-l LU £ Ki U'l Li~i OJ CO El LO iTi r-- _! i •J El U". r-- i-.O 0-J iTi iTi rci f'J _l i iTi ij-i iJi El iJJ El 0- f'- Ei I

i I LTi OJ IT: CO '.ri r

:i Oj iXi r. 1 r\- U"i l?-l El iji UJ iXi UT 5

r-j fj l"J OJ OJ Cm Oj

•M- i iTi iTi iJl iir'i iT'i iT; El El iTi iTi ij 1 iTi Ti

ij" U'i iTi iTi ij-. El iTi El iTi a-i Cl iTi T.

ILI

© El El El E El Ef E El E El E; El

_J

Lki Ix: i E; EJ E El El El El El G'l E E El I El El El E E El E E Ej El El El

LU IXl LU LU 1x1 LU UJ LU LU LU L£l 1 1 ^1 I LO iXi ro ^ 'X' i£i l'>- ro O-j Ei

Lu ;xi Oj IX) ICl E' ro iTi iJi CJ Oj r-- 1 ._J 1 OJ Li-i Ij! El El iT. E i£i

ii; i i ._! 1 Cj iji 'Xi Oil LO CvJ Oj in OJ Ul LO

:d ! i.M El El lE iTi Cl .'T, CO o:i LU U"l i CO UJ CO CO CO CO CO Oj h- r-- r-- r-- Cj <r iT, 0-) iTi iTi iTi iTi iTi CTi iTi iTi iTi iTi iTi 2: iT ITi iTi 01 iTi iTi iTi iTi iTi cn iTi iTi iTi LL Lu 'ii o El -> Cl El E E El El E El El iS El E E r "i i El r-^ OJ iJi r-- iXi r\- E iTi iJJ X uo Ei LTi in OJ c; ro \ • Ix Oj LiO O-J iji Hi fO

iJl iTi iTl iTl iTl iTi Oj Oj IX) UJ Oj OJ

._! _l iS E El El E E E El E El El El I 1 >i J? it >S Jf If 1 d E El E El El 13 13 El lE iTl E) El 1 El u-i El n El LO O U'r El uo E! U"-i El

a:

i_i 1 El E OJ OJ ro ro LO LO 'XI

149
rrd

h- CK LU

U_ 1-1- O i_J _J z: LU O X 1- Q >-< uj 'I t:

y-i

a t

rv

LU

I*—

J o t vt CD 1^1

'rlr' V--

i-jj G^i i_-' 'SD l-^l ; \ j LU LU LU LU LU LU UJ IXI UJ UJ iXi UJ Ll! 1 '^ lJ~J LO ro r-- ro Pv- ro Oj iTi 1 I C'-.J 'Xl '3 iji i-iii ro CC' Gj OJ 'Xi _J i r-- LO iTl ijj ijt r- 3 &J IXi rf'-j f'.-i D CO ro l_r;

'I]" Ul Oj IM LTi r-^ Oj CO cr. fj\

"nT 'Xi r-.j iTi LT' \>-) in

i3j I '2l U" LO ro p,i 00

C-.l 1 U"i IJ"! Ul b"i L"i iri in Li"' U"i LO Ln LO 1

di Gi -' Si El 1

riXi i-^i ti-i

_ U..I ^1

J Li-' i!D CD i-i.' di Li-l I--I ijj 1 1 1 LiJ LU LU LU LU LlI LU LU LU .LU UJ LlI id 1 rri III 03 iXi UJ Oj iM IT: -q- roi U 1 '£i l£! Oj in iXi t| rn i>.J Oi IXi _j I \\ f-,_ 'Xi LO 0"! tXi 0 i i"-J iTi LTi OJ IT: in i-X IXi LU \y\ Q iXi LTi iTi iTl r- XT

r>.j 'X' IX LTi LT.i UT LTi ^ f-:i ro ro

iTr ijD Oj q:> CD 03 o:i o:' 00 Oj Oj oil iTi iTi iTi IT. iTi iTi iTi jTi 0"i iTi iTi U-. iTi LU 13 i3 'Si iZHi Ci di El iTi di

U-u

UJ

ixl

DiLU

LU 1 IS i3 iS '3 CD i3 '3 i3 El El W 1 i3j 'Si 155 i3 Gj iS i3 iS El El El LU 1 1 ^ i UJ LU LU UJ UJ ixi LU LU UJ UJ LU LU U.I 1 O ! 1>J 1.x rx ro OJ oil r- IX OJ OJ ro OJ ro ro ro r^j iTi 'X in roi 03 El 03 1 _J 1 CD iXi ro ^ r- El r-- 03

f-5 1 1 _J i m ro iXi OJ tx 13 133 ITi 03

!_J 1 in in n^i ro OJ OJ in iTi iTl 0*1 1 iXi 'X t£i 1.x IX i-X l-il i.X IX IX '3 in Cri iTi iTi iJl iTi iji iTi CO iTl (T| iJi iTi iTi 0"i CTi iJi o-i iJl 0"! iTi IJ 1 ijl CTl Ci iTi iTi iji ts Q 13 iS Ci i3D llj d El El El El O 1 Ci ro r-- CJ 0-1 T'- i.£) 1^ G) iJl IXi a 1 IS in 13 in 1.x OJ 03 ro El u_ 1 El 03 in OJ iT) CO in ro 1 El iTi iTi iT) iTl iTi <X) 03 03 03 El 03

_i

_i iSi El 13 G) 13 El 13 El El El El i J-J 1 E i3 13 13 El El El i5 13 iS di Ei iTi 1 E' U3 El U"i 13 m U3 E- :n i3 U ' 13

i_i 1 El EJ 0.J ro r-'j liO LO l.n

150
1111 'D j CD G' 13^1 iD! int' £- iT'i

LU 1 1 

DJ UJ UJ UJ UJ LU UJ 1 1 

Ijj 1 < i UJ ! C'-J 0:1 rcf r- ro r' tjl rci IS

_J iJ^ rn 0:1 C-J iXi r- O-.l "si"- _J UJ IT} "'J 1x1 ill!' iJ 1 i\- Ij'l u 1 1- i"-j CO

\r '£<

W rn \r <T\ r- t?j 1J f u:i CO IXi Od Q-i

\-n rci CJ C'J

O-J |^J r-.! i"j r-j OJ OJ O-J O-J CvJ O-J i1

'3 'D iX' iD iZ'j is:* 111I CD CD C"i ~ '3D 'ID iD Xi

Wi j )~i UJ UJ IJJ jjj UJ UJ UJ Uj LU U_! ixl LU UJ I l\_ CJ 'X O' 'X 1 ij"-, 'X^ jj-) 1.x I'O IX' 'X' iTi C' ' _J ^ 1 f-rj 1 n LT' ]_f-t Ll"i IJJ 1 OD Oil r^~i IX' 03 r-- iiri 'T' 1 LU i XT I n T — Li_ ^ 1 > i rj 1 * 1 'Ti pi_ [ft r*i j XT 1 V| r~~- tX ':I 1 1 0 1 'T'l 'Ti iITi [— ° ' ' t 1 ) 1 j __

-i. '—

1^1 lA.' 'A.1 'X j 1 j

ill 1 Ll_ 1 CD

|j_ 1 X 1 Oil Wl

t— 1 I ,J o i LU

13r 1 _J

(/) LU ^ ! \_) (X. tK 1 UJ iD iD f~ J—, X 1 t:Z3 jTj it;;, ~^ iD 'D 'D ~ a UJ 1 y. 1 UJ 21 ! UJ UJ 1-U U,l UJ UJ UJ LU LU UJ LU LU UJ

Cj j p-.J f'v- p.J iTf 'X' U"^ ro pn 1 1 

•X T"*

J

•>r1- T-f

>J O-J iT> 1 CJ

X 1 I 1 b~i 'X' rci 'i'l U"' lT"i 'X ro

Ctl t— 1 Ql 1 1 U .1

LJ Ln f'' .' O-J •-^ 1 _ 1— iV 1 1 \ I —

rn 'jj 'X' C-J

I^'

0^' '.D V' ij 1 •r-l- LU —' HI ' U £1 1 {._ X' U *j \! Vt" \j OC II] <I i IJJ UJ lO UJ Oj

2: 1 Q-| (J) 'J 1 U 1 •Xi iT'i 'Ti 'J 1 - ' lT| u. Ll ClL 1 o O I 1— ^UJ fD _ iX _ UJ

if) 1 z: LU 1 O X 1- O 1 1— LU -1 Z 1 (Xi 01 C) i 1 C-J LU

Dl

Qa1-

r\-. OJ <Ji 'D \t iTj 'X •X (V) IS ir.t 'XI pj IJJ ID

LL Oj Lfi \r 0-J iTi in f-- rxi v~> 00 '3 iTi iji rJl tj^ CO UJ ij-i _l

(U _1 & ID ID ID !D di i.D ID iD

o:

Ta !

RE

UJ

!-

'X ^i: >5

Cki <s IS!' >D "S ID

LT) ID Lfi iD LO IT' 'D ID IXi iD

OC

f-.t fO NT \r> LO

li:

li: LU

151
LU

Ll

<X "a: h-cr a

DlD

Ll

X

LO !-

2: -J > f =3 r

SJ1 LU

(V a; Pi >

LU

ct: 2:

LL. LL l3c D

ox>— ^« • iil :x z:

L)') 0')M !

El E" El E El E E El El El E i IX: lE E' El E El E El El E El E 0 1 IX, IJJ laJ LiJ L'J LU Ixl LU UJ Ix! LU

'.£1 C'J

m Ul (Ji IXi El 0"! b"; _l ! iT. r- iJi 0.J IX iTl El r-- r-j _i 1 I.£ r-- 0:1 El OJ El Xi O-J El Oi UT

pi~ i n 1 }- ::t n~i T'J j'O 1—1

IJJ '£ 1 c' U-; E E iTi iJi iJi iX! A.: E! oil 1x1 f-J El 1X1 Xi r«:i iJi r--

G"! 1 r- r- i.X Xi IX 'Xi LTi iri LTi fj i C'J ! E! El E E E El E E El E E E

El El El El E El E E E E El E E Gj lE El E El E E E El El E)

i_i 1 UJ LU 1X1 IXJ LU LU LU LU Ixi UJ LU LU

r-'i ro Ij-i Xi Ul IX r- ro LO yi cn

_1 1 Xi El IX E 01 Xi E 5 M fO CO

-J 1 iJl r-- Xi •5- Oil C-J LTi IX ro r-- C'J 1 ij'i 01 LO El ro M O-J 01 r-j ro Ei Ll'- i LU r 1 Qi El iTi r-- LTi ro E 1x1 in O-J lj"l IXi 1 fJ ij-i CO Xi Ul "5- ro CJ El 01 IJl Ln ! CJ E El a i 01 IJ! iji iTl iTi iji iJl <j\ iTi iTf CTi IJ. "Ti IJl 1 LU E El El El E El El E El 'S El El E i _J

a 1 Ixl I El El El El :i

El E E El El E E E M 1 El El El E El E E El El E E E 1 n i LU LU LU LU IJJ LU Ll! LU IJJ IJJ IXJ 1 0 ! ij-i in E UO C'J 01 ro CJ 1 (I i El CJ iTl CJ 1X1 r-- Xi CTi E !

iTl 1 2: ! 1 _l 1 iTi r-- i.n Xi CJ ro r-- iji LO 1 Qi 1 1 _J 1 E ij"i r- ITi CJ

?f

ITi ro Ul cn CJ 1 E 1 p- <[ CO P- El I.D ro iT-. 1 01 1 1 r 1 iTi 01 01 01 r- r>- r-- Xi Xi Xi •Jl in <[ 1 r-- r-- r- r- r-- r-- rv \'- r-- r-- r-- 1 1 ! iTi iji iTi iTi iji CTl ij-. 0"-i IT. iTi iTi iTi cr-i 1 El E El E El E E E E El E E E i

h-UI

IL

-J

UJ

El

—' ro

iS iJl E

Ei 01 r-- E iTi IJ 1 E El

CJ iTi r- Xi rv. El IT, XI

Xi CJ 01 -J ^- rii E

CJ ITl 01 LTi ro

ITl iTi iTl 01 01 flj CD 01 fli E El E E E E E E E 1 J-; Jf 5-; ^: 3-J K 1 E El E E El El E E El E El E E 1 El Lfi E ITi E Lil E m E LO El in E

Ci 1 E El O-J i%j ro T-1 1X1 ITi Xi

152
1^' 123

I

jTj

1 1 r

1"^ ElT

iSj T

CD i3j

1

: 1

1 IJJ1 UJ ill UJ LU UJ

1 W

1 UJ u

1 UJ1 UJ( UJ

U" CJ I'.J irj '.£i Oj i"J EJ El Ul liJ iJl r-.. Ul Ul i.U iJJ Oj i3 I--. r-.- G-! riTi ij-i Oj El irj "2 1 r- IT: r- X oil i.£i El f.J 1,0 13 1 'i

r-r, C-.J IJ-1 ij 1 Oj

'?i ! ^r r': ('>

C-j 1 IS i3 El El El E El Ei E El

El

UJ

UJ i E E ijj E El E Er E E El E E

Q i El ;i El El E E ilJ PS E E E E

^ i

1 X 1 UJ ijj UJ UJ UJ IJJ I

J

UJ IJJ IJJ UJ UJ UJ

1 O 1 IJ"i iXi iT> ro E |>J i.j~i IJD IT) ro iJi r-- •I 1 IX' iT; ro m iJi i.£! E U"i LO r--

1 _] 1 in r-- Ij! f'- i- r- on r-- LI 01' iji

1 1 _) 1 ro r<-i CJ C'J to E

_:i 1 iJ.i iji i.D ? CD r-- ro iTi

iXi 1 i r 1 ij:i m E ij'i Oj loll Ij-i C-l Ipi E E E E E E E iTi

iTi iTi iji iTl iTi iJi IT; iji iTi Ijl iTi iTi OJ

El E E El E El E E E E E E El

i E E E E E E E El E E E E Ei 1 El E El E E El El El E El E E El 1

U.i i UJ :u U.I IJJ iJj UJ UJ UJ iJj UJ UJ UJ ! ijj lO in in OJ Oj CO L-i E ro 1 ._i ! IT LO ro 01' 0-1 OJ Oj r-- ij3 OJ

-J 1 Oj E OJ iTi E LTi OJ r- ro E 1 in iM i-X IJl OJ ro Oj fr. Ki'i E E ! UJ T. \ •Jj uo -r r':i iTi £1 ro r: r-- ro 1 r-j r-- '4 Oj LO OJ iTi in 0-J iTi i."'--i iTi 1

1 C-i OJ C-i E El E' iT iJ: IT on 1 IJ"i 1 - r- i->- r-- r>- r- r- i£i iXi ijD ij'i

i

Ijj _; E E E Ei E E E . Ei E El El IE 1

Oil

UJ

f

:

1 E f") r--- OJ iT r-- 'XI E \r IT IX- •I in E in iJj 0-1 on r-- ro E

U. i i Oj r-- IT' OJ IT 03 !-- LTi TO

1 £i IT iT iTi iTr IT iT in 03 03 03 03 03

_J

_J E E El E El 13 E E E E d E

K ^! J-i 5£ ?

5t 3-J ?4 5'; E E E E 13 E 0 1 El E 13 i3 13 E

E in E Ii3 E in Cj uo E LO E U'i E

E 0^) OJ r<

ro in in iXi

153
_i

u_

h-

(=) a

tr, H-I ZD

IS) LU

Q:;

LU>

LU

Qc LU o h- h- 3

LU LU LU 01 z: ixi LU I— O 111 Qi <I — H I- I- X

Ul If) 'St 
 -x 1—I

LU

a:

J3

UJ o

LU

Ct:

LU

h- i! IS' El El El E El El E E Ei Ei ! Ci Ci IS) El El Ei El '1-J El El El El O i LU UJ LU LU LU \±! LU UJ UJ UJ UJ LU Ll!

CTi i.Ti lT| Ul Ul Ul Ul Ui Ul Ul Ul Ul Ul _J 1 'Ji iji Ti Ul Ul Ul Ul ll 1 -iTl Ul 0"1 Ul

_i 1 IT'. Ul iJi U, L' ' Ul Ul Ul Ul Ul Ul Ul Ul

Ul iTi rr, U' U: Ul Ul U1 IT. Ul Ul

T. ! ITI a-, iTi iin Ul Ul Ul iXi Ul Ul Ul Ul

IJl Iji Ul Ul iUi Ul Ul Ul Ul Ul

iS i Ul Ul Ul Ul Co Ul Ul Ul Ul IJl Ul

C-i 1 iTl iTi Ul Ui Ul Ul Ul Ul Ul Ul Ul U1 Ul i El El E El Ei El El El El El E E E El Ei El E' E El E' El E E E Ei

El i LU UJ LJ UJ LU UJ LU LU LU UJ LU UJ U.1 E E E El IE E E E E Ei E E El

_J 1 E El El El E: E E. S: El iE E

_J 1 E El E El El E El E E E E El

El i.:d El E i i E E E E El E E r 1 Ei IE E El El E .E E Ei E El El E E E E El El El |— E E El El E

xj- i E E E E El lE El E E El El El E

El E El E El El El El El El iS E E

LU i ft 1 El El El El El El E E El E E El El

LU UJ IJJ UJ U,l UJ LU LU UJ UJ LU UJ LU ^1 1 O i E El E E El El E E El El I 1 El E § E El E El El El E § E:

2: I 1 _l 1 E E El Ei E El E E El E IE E

9r ' E E El E E El

g El E El E E E E E El E El El E E E E. E El El

u-f i E El IS E ~J El E El El E E El E E E E E El E E E El El E lE El E E E E E El E El E 1" E El E

f_j 1 E 'D ^.t IV ro TTi Oj u:i \r> X i El E El O.j en f'- Ul E

U- 1 O Oj l.JJ v-i El CO I.JD ro Ui Oj 1 E Ul u> Ul I7i iTi on El o:i on Oj

El E El iU E El El E El E E

U- 3-; 5S J-i it JC Si- Jc 1 El E E E E El El El El E El E E 1 E LO E in Ei LTi E E E E

1_! i El El iM OJ ro r--j in in IJJ

154
I

CD

lU

2;

a:Ci

ix.

_i

:d

cn

LU

LU>

LU

ac LU

'I ;I

Lj- o I-LU IJJ IJJ fJ-) z: uj ijj ^- o <ic iK 'I a — h- 1- - 1- X

tn ix> ixi u'l ' I u

LU

a.

J3

JO

'S> ,Vj Gi Gi GiGGG Gi

G Gi

Gi |Tj ijD Cj Gi 'Gi Gi

G Gi

GG CD G'

O i 1 1 Ijj IjJ LU UJ UJ |_UU 1 Ijj

UJ u;U 1 UJ iTJ CO r- r- iXi iXi LD tJ^i f't ro i?~i ._! 1 \\- r- f- I-- r- r- r- r- r-- r- 1-'- r-

.J 1 ON ,7; iT'i ij'i iTi iTl Ijl 0-! iJi CTi iTi iji ij;

I'""! a; 'T: ij'i cri 1.T1 IT: IT, 0-1 iJl iTi i:i-i IT: '£ 1 IT, ,T, IT, 0-1 0-1 1J1 0-1 171 0"i iji IJI 0-1 iTi

IT, IT: ,T, iji iTi Oi 0-: IT, iTi IT, iTi 0-1 0-1 12 1 iJl IT, ,T, Q-, iJi iTi iJi iJl 0-1 ,T, iTi 0-1 0-1 OJ 1 iTi ij> ,T, iTi cr. i,Tl iJi |J-| iTi ,T, ij- 0-1 Ijl OJ i 13 G' 13 Gi G Gi Gi Gi G iG G CD

UJ

11:

UJ

G Gi iG Gi

GG Gi Gj Gi

G GiG l,;J

IJJ LU

!iH lU IJ-I Ul UJ UJ U.I LU UJ LJ UJ

G' Gi Gi GiG iGG GiG

G CD CD i G G G Gi G Gi Gi Gi G G Gi G- G Gi G G- G Gi G Gi G G 1 s 1 iG Gi Gi Gi G Gi G G G Gi G G Gi

Gi

G Gi Gi

GG Gi Gi

G

G Gi i;;:i Gi

Gi

G Gi Gi

GGGGGG

GG iG

G 11..1 Gi Gi iGGG Gi Gi

GG Cj G:

G Gj

G Gi Gi Gj Gi Gi Gi

G C." Gi iG

UJ 1 1^ 1 G

GG

G GiGG Gi Gi

G CD Gi

G 1 !ZI 1 UJ LU UJ UJ UJ LU UJ UJ UJ UJ UJ UJ IXi

'. 0 1 Gi Gi iG CD Gi

GGG

GG iG G. iG

G 1 Gi

G Gi iG Gi

GG CDG CD CD

G

z: i _J ! G i-r, iG

G G' CD

G iG :i: IS

G CD iG

Q. 1 i ..J { ISG Gi Gi Gi Gi Gi Gi

G CD CD IS

Gi 1 Gi

G GiG IG

G Gi Gi

G ilDG G'

0"! i 1 !ZI 1 iTi

GG iG 15 Gi

G Gi CD CD

iS

G Gi

gGGGGG ^ Gi Gi

G

G GiG Gi

GGG

GG iG Gi Gi

U 1 IS i-D Ki 0-J rri OD ij:i \r.i 'I 1 iS iG IS C-l fi) 1,'' iTi V'- LL 1 iS OD iJD OJ G i.£i ro IT, ;g

_l 1 IS iTi iTi iji Ijl iji iXi OD OD iDD r-'- IV

_J

G Gi IS

G iS iS iS Gi Gi iS

GG 1 >i 5£ >4 K J4 54 j; 3-i Ji .>:; 11: 1 iS G Gi iS G Gi Gi Gi G Gi G IS 1 Gi LTi IS ITi IS UD IS ;r-i IS LO ID in IS 0 1 iS IS OJ n rri l-Ti liD |j:i

155
on

01

yUJ

Qi

Ct .a: :d u_o i- ILu ijj ixi ir> 2: LU IJJ i—

CO 0:1 u'l en

LU

1 IS iS Si i3 El El E E El El El E

IS IS Gi IS E! El iS E El El E E

g ! !_U LU UJ LU liJ LU m LU I.U UJ UJ LU UJ

i

ij! 03 Oj CO Oj CO UO IX. UJ Oj Oj CO CO

._i i iJi Ul n-| IT-| 1J1 U: Ul Ul Ul Ul Ul Ul Ul ^ ._! i iJr :J-| Ul iTi Ul Ui Ul Ul U, Ul Ul Ul (J-, U.! ij-i :J-; Ul iTi u. Ul Ul Ul U Ul Ul Ui Ul

i ! LU iJi IT: iJ-i iJi Ul Ul Ul Ul Ul Ul Ul U: Ul U_ i i r-.j iJ-! iJi Ul Ul Ul Ul U! Ul Ul U; Ul Ul

IT, 1

,

IJI Ul Ul Ul Ul Ul Ul Ul Ul u CL ! 1 01 i iTl iJi a. Ul U\ Ul Ul Ul U Ul Ul Ul IT.

i i LU

1

1 El 0 iJj Q © Gj El E El E El El

1 !^

E> i-ii El i3D El E' E E E El

! cu El El E Ei El E El E El El El El 0 1 UJ UJ LU UJ UJ ^

LU UJ 1x1 UJ

>-< 1 Ul OJ El CO in OJ El Ul |j:i _! 1 E El E El Ul Ul Ul Ui

1 Ul Ul Ul Ul ;ii u. Ui Ul Ul Oj Oj CO CO

Ui Ul Ul L: 1 Ul Ul Ul Ui 0"i Ul l"^l Ul

i: ! U: u. Ui Ul Ui Ui U1 Ul Ul Ul Ui Ul Ul

Ul u Ul Ul Ul Ul Ul Ul Ui U, Ui Ul Ui

Gi i Ui Ul Ul Ul Ul Ul Ul Ul Ui Ul Ul Ul Ui

f J i Ul Ul Ul iTi Ui Ul Ul Ul Ul 0"1 Ul Ul Ul

13-J 1

1 El E El E E E E El El E El El E

1^ i i 1

!

i E El El E El E. E El El El E GI El y i

I 2: 1 LU UJ UJ LU Uj m LU UJ UJ UJ UJ LU LU

1 0 1 E El El E El El El E Gi Gi El E

:X i 1 1-1 1 E E El El El Ei El El El Gi g El 2: i ! _l 1 E IE El El El El El IE El g Gi El

Ui i 1 _! 1 E El El Ei El El El g Gi Gi i3D E El

El 1 ! 1 El El El El iT"! El E El El El iS El El

01 1 r i E El —

1

Gi Ei El El E El E El Gi E

1 1 E El El El El El Ej El E E E El E

[ i

i i El El E El El El E E El Gi IZl Gi Gi

I

I ^ \

0.o

a;

Ql

UJ

E M rv CO in LO LO E El n LT r- Ul •^ r- Gi i

Oj |i;i i- OJ IP CO ro Ui 01

Ul Ul Ul Ul Ul 1X1 Oj Oj 0:1 0:1 r^-

Gi El E E Gi E Gi E El El El Ei

1 K 5-S >i K it if 35 ii J£

i E El Gi Gi i3D El E Gi E Gi E E

1 E in IE U" E Ul Gi ir.i Gi IXi E Ul i

1 El Gi 0.1 P-J ro M IXi Ul t£i

156
El El El El §

El El IS Ei

IS

d El El El El E E El E El

.71 i 1 ! j LU UJ ll: LLi LU LU UJ LU UJ UJ LU LU CO in i.£i LTi U"i iT) U"i r.i u-.i U'l Ul iil a _J 1 >T! ij- IT; IT. iTi iTi iTi Ti IT: iTi iTi iTi iT _i ._i 1 IT, U 1 O 1 iTi IT; iTi iTi iTi iTi iTi ;-r-. a

LU iJi IT; iTi IT. iTi iTi iTr iTi iTi iTl iTi iTi Oi 1 1 LU r 1 iJi Ijl iji iTi iTl iTi iT, Ui •T Ij! iTi iTi ;t. U. i 1 r-j ij iTi ij'i iT iTi iT. IT, iTi -1 i"^'i iTi iTi

iTi iT. u-| iTi IT' iTi Tl iTim a-. iTi iJi IT' <r

h- 1 1 0'' iTi ij; cn iT IT- iTi iTi iT'i iTi iTi iT iTi a: 1 ; ixi IS Ci El El S' E) El EJ in e E' El « 1 ! ._!

ID

IUJ

ft

LU>

liJ

Ql -X Zi (T

u_ g; El !- I- E)

UJ LU UJ 01 Z: UJ LU 1—

Ol u:i iTi CO •!

c_> LU

Cti 0-

T3

O) J3

n3

UJ I El El E El El El El El El El

iSi El El E El El Ei El El El El El El El E

:z: i El 1 LU LU LU LU LU LU LU UJ LU LU LU LU LU

i.Jl in 1 i-t Oil CJ iXi E ro

_j 1 i.JIi !/:! y"i ^'

rom iM Ei E I.T; ..J i r- r- r- r- f- r--

1'- r-- r- r- r-- I.U

iTi iTi iTi iTi iTi iTi iT, iTi a-i 1T- iT-, Q'l £ i Oi iTi iTi iTi iTi iTi ITl iTi iTi iTi iTi iTi IT. a~i iTi ui iTi iTi iTi iTi iTi U. iTi iT El 1 cn iTi iTi iTi iTi iTi iT'i O'l iTi iTi T' iTi O": i?J 1 U1 iTi iTi iTi iTi IT- iTi iTi iTi iTi iTi El iTi

C'-J 1 El E' El El iS El E Gi El Ei El E El

!-

LU

I-I

Lk:

LU

UJ 1 El E Ei El ij"i E E Ei El El El El El o . E E. El El Ei E E El El El E E El

UJ UJ UJ UJ Oj UJ LU U.! UJ UJ LU UJ LU 1 1 i 1 iTi iTi iTi iTi iTi IT, IT IT cr. iTi Ui iT; iTi •E i iTi IJI ij-i iTi iTi iTi iT. iTi iTi iTi iTi IT; z: i 1 1 1 iTi iTi iTi iTi iTi iT 1 1 iTi iTi m iT, iTi ITi

lii 1 1 .-J 1 iT, iTi IT. iTi iTl (Tl El IT. IT-! iT. iTi IT. iTi El i iT'! iTi iTi iTi iTl iTl iTl iTt IJI 1T1 iTi Ui iTi 0"! ] ij-i iTi iTi iTi iTi IT T-| r. iTi CO Ti .Ti TIT'T iTl iTi iTi iTi iT! iTi iTi iTi iTl Ti Ui C i iJ-i 'Ti iTi ij. iTi iTi iTi IT- iTi Ui iTl iT IT I El El El El E E El E El E El El E . i i.£i r^- ro ri.i ro CO ITl I 1 § El E iaJ 10 f- Ti ^-

Li. 1 El IT iJli L">.! El iTl i.D XT iTl % 1 El IT. iTi iTi iTi 0-1 oil CO E CO El r-- V-

-J

_J iSIi El E El 12 El El El E E Ei Ei

54 >: 3s:; J-S El El El El i3D ID E E El E c. E Lf:> El in g LO E in E in El Ul El

El E l^j |>J r""i I'-i UI iXi

157
I d El IS iS iSIi El liJ '3 (jZi ia5 IS Gi CD Cj en 2: 1 O i IJJ UJ LU UJ UJ UJ UJ UJ UJ UJ UJ UJ Uj

iS) C-J C-J PJ OJ OJ CTl E'

-1 1 C: IJl <T< ij^ Ui iTi IT; iTi rr'i I'Ji iTi CTl iTl _j Ij 1 iTi iTi CTi iTi U' CT, iTi ij'i 1 ''i iTl IJ'! ITl IJJ iT'i iTi iTi iTi CTi Ijl cn ijl iTi iJi iTi iTi 1 1 LjJ ^ iTl 1T1 iTi iTl iTi IJl CTl IX, CTl iTi iT. iTi CTi Ll 1 1 M C"l iji IT, CTi cn iJl iTl CTl CTl iTl •IT, rr-i CTi

iTi iTi Q'! CTi Ijl iTi iJi iTi iTi IJ- IT. iTi 'X 1 1 OT iTi iTi iTi iTi CTl iTi IT; iTi iT. iTi IT; Ul iTi \-

a: 1 ! I±l iS iS iS3 i5jO IS Gil iZ) <Xi El IS E

LTi

U- • •s El E' El El ,v, El El 1^, IV' El ( -r- j

1*7'; iS El iS El El El El El iS El UJ UJ UJ m UJ UJ UJ UJ UJ UJ UJ UJ UJ

I.JJ f\_ iTl El Gj iTi CD

-J I r- IX' LTi U-i ^ JO CJ El iTi r-- 1 '": _J j Ul U"i if) Ln U't LTi LTi \t ^

IT'! iTl cn iTl IT. ITl iTi Ij', IT, l-:'l n~; IT, aS

iTi iTi ••T'. iTi iTi iT. CTl iTi O'l iTi iTi :T, 'Ti iTi iTi iTi iTl CTl <Ti CTl ITl ai iTi 'Tt ITl IS 1 IT, iTi lT| iTi iTi iTl iTi IT, iT, itI iTi iTi iT,

I."" j 1 iTi IT, CTl IT, iTi iTi CD iTi ij\ 'Ti iTi IT,

|^j 1 El El Ej (3 E- El

O El El El IS El

O i LU 1 E El iS iS E El iD iVi iS IS El El El O 1 iS iS El IS iS iS E El El iS E El El

UJ 1 1 21 1 UJ Uj UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ U.I T. 1 1 O 1 03 O'J 03 o;i Oil El QCi CD IS 03 CCi C"' s iTi iTl <j\ 0") CTl CTl iTi iT) cn iJI iTi IT: 1 _l 1 01 IT; iTi iTi cn iTi iTi iJi cn iTl ij^ iTi ITl £ I 1 _J i iji iTi Ti iTi cr. CTl (Ti cn ITl 0-1 iTi iTi 1 'Ti IT, iTi cn IT) CTl cn iTi iTl iTl iTi iTl IT,

ixj 1 iTl iTi cr, iTi CTl iTi cn iTi iTi ei iTi 0-1 ITl 1 iTi iTi (J\ OY iTl IJ 1 IJ 1 'Ti iTi iTi iTi iTi iT) 1 |J^ iTi <T\ Oi CTl iji Ijl iTi iTl IT. iTi iJi cn 1

El El iS El El El E5 El IS s i2j E El

u 1 13 Ij3 ^- OJ IS in LTi a ! IS E IS pi-j in r- iJl \r IS u. 1 13 iJD n-j iS 03 1-J3 ro cr-i 03 1 IS iJl ITl iTi cn 0-1 03 CD IS iS 03

_j El IS iS iS El IS 13 IS El El El E

•X

tK 1 13 iS IS El IS s iS E 13 s 13 IS IS 1 IS Ei LTi CD ir.i IS ITl IS ID iS IT) Ki

a:o 1 E iS 0.1 OJ ro r-o in tri

158
1!1j 11t1 'SI' 'X? i-ij 'Xi •X' 1^1 1_:J CD 1 --, 1 '_-J • ^ ! O ( LU LU 1 1 

UJ LU LU LU LU Lu LLi LU LU LU LU

r-- lJ"i CO LT; iXi 'Xl CD 1. "i LO ij] 'Xl Cili '.j~' LO

-<? 1" Fi 1 Tl r^' C-J 'r'-j I'Sj 1T1 ij. ij( IJ) !Xl U 1 lT| 'Xl ix'i :X'. ( ' "i iJi tji "xi iXi \r\ ij'i i5"'i iX. iTi 'Xl iXi

'Ti iTi iji iTi 'Ti iXi ^Ti iXi iX. 'Xl o*-j •Xl

Gl! i iTi iTi IT. 'J' IX. iXi iXi Ui iXi iXl ifi'i 0 J i iJi 'Ti iXl iXi iXi iXi 'ji 'Xi •Xi IJl 'Xl i

OJ iI

iXl iXi ;X- iXi 'iXi 'X' iXi (Xi IX) iX" 1t1 j I—' *X' __ 1 'X) '-^ 1^1 Ij.' iX) i-ii-' iXt 1 ZI 1 O 1 i±l Lu LU LU LU LU LU UJ LU LU Lu LU LiJ CD ' ^ t 'Ti 'Xl 'Xl 01' ijI' »3j 0_i f'-- r*- ! 1 o; i3j iXi 'Xl '31'

'3r' 01' ijj UJ iJl,' OIi i 1 1 iTi 'X*5 'Xl L' t

'Xl ^Xi 'X' •Xl

1^'

'X'l

u I iTi iTi tXi iX; iX: iXi iXi iXi tX) iXi 'Xi IX; LU iTi iji tXl iXi iXl iXi O"! iXi IXl iXi 'Xl U i l_L Tnj iTi 'J ! U 1 *Xl •Xl iXi J l 'Xl i—t CTi U i 'X' 'Xl 'Z^ Xl 'i? fJ

'1 'Xl 1 ij J j IT; iXi iX) (J 1 iXi '.1 

U i tJ i ! i U

lH1 * " ° LU i '51' CD iX' l,\ ! iX' •Xl ! _J j ci: Li_ Qu j 1 ^ —

LU! LU

Qi LU • III)

-,- l-iJ

_

— liJ

*-^' 'Xl iXi iXj UJ LU UJ IJJ LU LU LU LU LU LU uJ Lu LU LU LiJ ZI Cj ! ^- f^- r*- P — P'- 1 - f - r f"'~ UJ ' ' I CTi iJi 'Ti 'Xt iXi 'X'! 'Xi Ci

'v'

'Xl iXi iXi 'Xi ' _l i iji 'J' 'J "1 •Xl 'Xl iXi 1J ! IJt 2-' iX't iJi

IZ.' Ql LlI 1 _J I iTi *Ti 'Xl

L.' C't (Xl 'Xl 'Xl 0^1 Xl 'Xl CTi 1 UJ Lp LU 1 —

1 1 j iTl 'Ti •T'l 'J 1 U! iXi '-' ' 'Xi iXi 0 

'Xl iTi iXi

LlI x_ 2_ 1 H ! Ij') iJ^ tji iX^ iXi iXt 'J I iXl iXi 'Xl 'Xl iXi

'^X ^1 ':X 1 L,' 'Xi

U i •Xi 'X) 'Xl 'Xl \T\

'iL.' Xl IJ 1 iXi ^ f -r—I 1 'J U t 'Xl 'X"! 'Xl 'Xl 'X"! 'Xl iXi L) 1 Ci 'Xl iXi q: i o f-^ 1

—> \ 1 Gil i3Ii iX" iX'

—

'Xl CD

O iXi <SD t23 iX' LU LU UJ 'JTi 1 !!ZI LU LU V— O Ql Cti 'GT

H-i j_ [_ H. 1 Oj 'Jl CO 0.1 •X ! u j Qi Lil nU— O ] h- . . p._ pi"! p.j OD Lj- (j-j <x j Ci X"i ITJ f-- iT-l Ll_ iTl 'D irr Oj i.n ro iXi CTi 1 rJt iXi Xl iXi iXl Oj Oj Oj 'Dj Oj r>- r- 1 OJ _J 'XI CD iXi 'Xl 'Xi iX' iXi i3D (Hi iXi iX r~

LU 1— lL j [j LU j X 1 £ 15? ky iXi 'X* 'X; 'X' IX'

iTi iXi iXi ITi *it,i LTi i3j iS 'Xl i iv

CJ '!*nJ 'jZ' I 0:^ i ^\ LU

159
El i3 El El El 1^ E' El 1 Gil E< El El El El iji-i El El El ! O i LU LU LU LU LU lU ixi LU 111 LU UJ LU LU 1 (-0 0"-| a-i iTi r-- 'iJ -•Xi LTi ITi TJ- 1 _J i Oil r- r>- f'- f- r-- I- fv. 1-'- f-- r-- 1 "Ij _J iJi iTi iTi iTi iTi cr-i CTi iji iTi iTi iTi 1 LU U'( iJl cr-i iTi Ui iTj CTl CJi ij, iTi iTi iTi 1 ] i \n iji iTi CTl iTi ffi iTi iJi iJi iji CTl iTi i U. 1 ' i iTl J-i iji CTl CTl iTi 0-1 iji iTi Ui iTi iTi 1 i <j'l Oi o-< CTl iTi CTl i"^i iJl iTj iTi ij'i iji iTi i CC

i— ! ! 01 iTi iTi 'Ti iTi iJi iTi CTl IJl ij-i iTi ij) Cl 1 i LU O El E' El E El E E El El El ! a 1 i _J

1-

_l

ZjCO

LUCK

i.U LU—I Qi

L"V: lU I— LU QJ iliHT. K fl =3 O I- 1- Zi LU LU 1x1 fS> 2: lU LU I—

rztii: ol <£

a

I- I- I- 71 LO i J"i 'Tl W 'I U

UJ

cn

C3^

n3 i ] El E Cl El E E E El El [ !2I ! Ei El El El E El El El E' El El 1^1

UJ LU LU 1 1 1

LU 1 1 1LU 1 1 1 1 1 1

tu Ij 1 1 1 1LU

iji ro iXi hi >£' CTl i.'.l fo XT i _J 1 co i-£l ij'i i.£i rn '.O r<-) E r- i _1 ! Oj CO on o:i 1^- r;- r-- r-- 'Xi iXi iXi 'Xi LT.i rn iXi m OD o:i ijj rn rn GJ m 'X'

iTi iTi ffi CTl iTi cn CTl cn ifi CTl iTi iTi

ij'i iTi iTi iji iTi CTl iTi cn iTl iJi iTi CTl iTi 1 E' 1 iTi iTl IJl CTl iTi iTi iTi ijt CTl iJi CTl CTl 1 C'J i iJ-i iji iTi CTl CTl iTi cn CTl iji CTl iJi iJi iJi 1 C'J 1 E E E El E El El E E O El El E O

LU 1 El E' El El El El "E El El El E 1 E O E El E E El El E ii.1 El E ii,i !

LU 1 X 1 LU LU UJ UJ LU UJ LU LU iU LU UJ LU LU i Jl, ! i_l 1 LO ID Ul ITi LO IXi ^ \r ^ xT 1 'E i CTl CTl Ul CTl CTl Ul CTl CTl Ul Ul iji Ul CTl 1 121 1 _1 1 CTl CTl CTl Ul CTl CTl iTi CTl CTl Ul Ul IJ 1 ij 1 1 ili 1 _J 1 CTl Ul Ul Ul CTl CTl ITl CTl CTl CTl Ul CTl CTl 1 _i ! Ul ij1 Ul Ul CTl CTl CTl CTl iJl Ul Ul CTl CTl 1 ij~i 1 1 CTl Ul cn Ul CTl CTl CTl CTi cn Ul Ul CTl iCTi 1 1 iTl Ul Ul Ul CTl TTl CTl CTl Ul Ul Ul CTl Ul 1 1 CTi Ul Ul Ul Ul CTl Ul CTl Ul Ul Ul Ul Ui 1 i 1 E El E El El E> El E E E E E E 1 oKr_i 1 E i-Q f<-i TT r^- ro ro 01 LO JJ-i r>- 1 1 E' iTi i"J fri Ul Ul m 1 Ll. ! E ro iXi iM El iXi 'Xi \T ff Ul 03 1 1 E Ul Ul Ul Ul Ul CO CO iij 01 01 rv- 1 _1

_l E <s E El E E E El E El E 1 <r

LU

ct:

UJ

i-I ^* >: >* i i E Q (B El E El E E E E E 1 i E ITi E LO E Ul E Ul E yi E Ul

cta 1 13 E Ol iM

mM 01 Lil

<X

UJ

160
!111i I1I1 i3 iX iX 'Xi iXi IXi iXi cs;i CO 'Xi IX 1 1 'SI' 'X' iX^ iXi nil iXi El iX' iXi 'Xi iX IX !1 i 1 ^1 1 LU LU LU LU LU LU LU LU LU LU LU UJ LU m Ln Lfi OJ r-- 2 r - C'J . CJ i3D j Ll~i r - OD iTi iX' iX CD dZi Ul Oj t£i Ij !

1. o UT rn 'X Ul r- i.Xi U"J LO bO U~i LO LO IT) b' in U"i XT ^

iTi iTi O'l Ul 1 11 Ul Ul Ul Ul Ul Ul

iTi

m Ul Ul Co Ul Ul rri Ul Ul Ul Ul Ul

iZTi f 'Si iTi iTi IJl Ul Ul Jl Ul Ul Ul iTi Ul Ul

0-J 1 ijlL "I i.Ti Ul Ul Ul Ul u, CTl Ul 00 i

I^^J 1 iS iXi (Xl iX Cvi iXi o iX IX iXi j111! i11! CD © iX' IX Xi iX iX IX iX iXi 'Xi iX 'X' I 1 iXi 'XI iX IX iX iXi iXi iXi CIi IX 'X f1

..L, t O ' LU LU LU LU LU LU LU LU LU LU UJ LU lU

fi-, Ci iXi CO r-- LTi hi •Xi GO 'Xi r-j "1 1 CD iX _! 1 t I ijt 'T< iTi iji Ul Ul Ul Ul Ul Ul Ul Ul LU 1—1 1 ij- ijl iT'i CTl iTi Ul Ul Ul Ul 0^1 U 

0"l Ul '—

i LU ' iTi CTl iJi Ul iJi Ul IJ 1 en Ul Ul Ul Ul U 1 ! r-.j 1 Ci iji iTi iT: |J1 Ul Ul cn Ul iTl Ul Ul Ul 1 1 ! iJi iji iJi ij"i iji Ul Ul Ul Ul 1 Ti O'l U 

Ul <x ' fj~J . tTi ij^i iT> iITi iT: Ul Ul Ul Ul Ul Ul" U 

Ul (—

a: 1i UJ 1 1I •X' 'X' IX IX iX iX iX iX IXi iX iXi ^ 

i I i I [—.

q; Ll i o

U- 1i 03 I LT! 1 h- ' _l 1 LU ! =P 1 _J ( 'Jl 1 1—! o 1 Ul 1 I iX Q£ ' LU iXi iX iX i3 iXi iXi jXi iX 1 1 IS iS iX iX i:s-i Gj iX 'X' iX iX IX iX iX i 1 LU I UJ i LU LU LU LU LU LU LU LU LU LU LU LU LU 1 j~- O 1 IX iX* 0 ? Ul Ul CO IJJ r-- 'Xi i-Xi LU 1 <L OJ CO iXi OJ r-- f-w f- f-- ^- I- r--- '—

LkC I ji- ._J 1 'T'! IJl Ul IJI Ul Ui Ul Ui Ijl Ul Ui Ul Ul

Qi uJ i li- _J 1 iJi iTi iTi IJl Ul iji Ul cn Ul Ul Ul Ul Ul 1— UJ !^ ' _J '' ' 1 iTi U i Ul Ijl Ut Ul Ul CTl Ul Ul Ul Ul U 

LU 21 XI ..^ i 0"J 1 iJ'! (Ti Ul Ijl Ul Ul Ui Ul Ul Ul Ul Ul Ul Ot :3 -x 1 1 iTi iTi iTi Ci Ul Ul Ul Ul Ul Ul IJ 1 Ul Ul 21 X 1 ' 1 ij'; Ci iTi U'l Ul Ul Ul Ul Ul IJ 1 Ul Ul

LL Qi 1 O 1- h- ZD : © iX IX iXi iX 'X' CD iX' iX 'X' 'X iX

LU IXi LU 0"! I Z LU UJ 1— 1 O Cti iK -X 1 (— 1—1—21 1 0~J 01 'X i 1 1—

I <_1 1 1 LU ] Ql ] Q- 1 O

t- j tj l£i P'i iv ro CJ Oj 1)0 1 1 'X 1 (Sj iX CM r-i in rv Ul (Xi . u. 03 'X! l^J iX CO <j:i ro CTl 00 i i -J

cs:i ijl Ul iTi Ul Ul IJJ CD Oj CO CO r>- r^-

n 1 [ _l 1 a

iS IX IX IX iX IXi CD iXi iX iX /X iX 1 r 1 ] i LU t11 1 QC 111 I11 \ IJJ 111 1 1—

>= 1 X >i >t }.< >* ^^ 1 Ck: © iQ iX IX iX IX iX X iX iX iX iX

Ijl iX in iX in IX IT in iX ill <x 1 ll: 1 O l>J Kl \r IJ"1 U 1 i QC

ER

161
IS i3 El El 13 E> El El El El El

Q

El 12? i3 Gj Ei El Ei Ei El El El E' 2: : 1 ^! ( iJj UJ LU UJ Ijj UJ IJJ Ul UJ UJ iJJ UJ UJ to ID \y

iS r... Oj Ul iXi fi-i El fvf-1 _J ! r- r-- I.L1 is:> U" b"i vT ^

_l

—' ! cc Qj tXi P"! CO Cj CO on CO QJ CO Qj

ixi '71 U. ;^ iTi Iji iTi iTl CTi iTi iTi CTi CTi iTi 1 1 IJJ i: I iTi ij] iJi iJl ;Ji iTi ij-i iTi iTi ij'i iTi Cl u. i i ru iJi iTi iji 'T\ iJl i~i iJi Co Ij-I iJi Ci IT: IJl 1 Ui iJi iji ij- IT. iTi Ul 01 iji iTj IJ 1 Ul fL i 1 ill' ty\ iTi Ti IJl Ui IT; Ti IJl CTi iTi iT; Ij-

<I 1 i ijj ei

Q E. E" El El iS El El Ei El

Ul

Ul 1 El El E, El El E. Ei El iVi E El IE El

El El El El El El El El El g:i E El

"7" j El 1 Ui UJ UJ UJ OJ UJ Ul U.I U-l UJ

Ui 1-0 Ul Ul i.£i ro O- LTi Ul

_] ! El i-Hi i"'-.' r- OJ LTi iJJ r-

_! i Ul Oj i-£i U"i ro OJ El CO LOi roi

rci iaJ i"-J ""J OJ OJ 0! OJ S ! Ij^l Ui Ul Ui Ul n Ul Ul Ul Ui Ul Ul Ui

u. Ul Ul Ul Ul Ul Ul U, iTi lUi iTi Ul Ul El i Ul Ul U'l Ul Ul CO Ul Ul Ul lUi Ul Ul u-l CJ i ;m 1

a-i Ul Ul Ul Ul Ul IJ! Ul u. Ul Ul U: Ul E El E: El El Ei E Ei E' E El El E X

UJ

UJ

h-Xo

1X1 1 1 1 iJJ 1 El Ei El E; El 13 El El El El i

Ei El 1^ 1 E. El El El El E El E IS- E El El LU U! Ul Ul Ul Ui UJ i'j UJ UJ ^ ! ! 1—1 t Ul Ul CD t'- r\- Xi LO ^ rn 0! El

cr 1 £1 i-O i-Jli i.£i i.£i i£i i.£i i£i i£i iXi ID i-£i i£i 1 1 Ul Ul Ul Ul Ul Ul Ul u-i Ul Ul U: Ul

li: i 1 ! IJ! Ul Ul Ul Ul Ul iT, Ul Ul Ul Ul 1 i U! Ul Ul Ul Ul Ul Ul Ul iT» ;?i Ul u. Ul

CO i 1 n 1 Ul Ul Ul Ul Ul Ul Ul Ul Ul 'j< Ul Ul a.

Ul CI Ul u. Ul Ul Ul Ul Ul Ul Ul

Ul Ul iTi Ul Ul Ul Ul Ul ^, Ul Ul Ul E Ei El El El El I3D El El El El El El

SSTj iJTi roi t-- ro 0.1 CO IJ-1 Ul

IS El

C OJ 10 U"i r- Ul

Q on i-D OJ El ro i.£i ~t Ki Ul

IS Ul Ul Ul Ul Ul Oj CO CO on 03 rEl IS El IS El El El El Ei El Ei El

J- >« .>•:

K J? 5:; it

K

El IS El El E IS IS E El IS IS IS

El ITi iS Ul El LO Ijl El Ul IS

El Cj OJ r-1 roi Ul ITi 1.0:

162
11 111 ill

—

1 1 III E' '~ CZi i i 1 1 ! LLi W UJ UJ U-! UJ L'J UJ IJJ L;J UJ 1 i i i ' ! IT, r- f- (£! 'X to Ul U'f i i 1 i ' 1 10 OJ '.£! r-._ r-- Lfi LO r-._ 1 1 1 _l 1 C'-J [•- r--: iTi 1. >' CO 1 i 1 ' Iz^ f 'X' i.T, rri r-v- U": \f- ro CJ

hW i.n IX" IX' IXi j.ri iXi i,n 'X 1 i 1 1 1 CTi IT- U'l iji IT) ij'i iTi iJi iTi Ul 1 'Ti Ij"! a- Ij. iJ: I./' 1 iTi iJi '7: IJl 1 1 1 1 ; 0-: a'l ai iTi iTi iTi iJ'l IJ 1 1 ;1 ill III El i3j CD © 1

LU

eno

U-

(Sl l--in

UJ

a:

UJ

UJ

UJ

2:

Cn Ix! h- UJ IXI UJ IZ T.

Ch. '.r zj 2: 2:

Ll_ O !- Hijj UJ ixi tr.i z: UJ UJ 1— o Qi 'O: « - I- I- I- z:

(.0 iT) 0"; ij'i 'X CJ

UJ

ct: Q-

«3

UJ I

-J I

Ix i

1X1 tXl 'X' © C-i iX'

en

CTi

IT,

IXi

•'3

'J:

UJr - CJ

iJi

iTi

UJ

hi

UJ

r--

<!., T

f^,

0-1

iTi

Ijl iTi

iTi fO

rr-i iTi

IJ'I iTi

iTi

r--

iT|

IJl

iTi

LT'

iTi iTl

iTi

CTi

Ln

r<:i iJi

U'l

ixi

iX. rn

IJ", IJ!IT.

ijl

I.U 1 _l 1 1 1 1 1 1 1 0 1 UJ 1 1 1 1 1 1X1 El E' El El El ijj 1x1 El 1 i Gi El El E El 1x1 El rB El Gj

UJ i i x: 1 UJ Ui U.I UJ UJ UJ UJ UJ UJ UJ UJ LU UJ

"21 ! 1 0 1 IJJ 13.J iTi •£i El u:i P'-i u'l

'CT 1 1 " 1 'P 'Xi

X LTim if) -J- {'' I'-i 1 —1 ; Gj JJJ ijj CO Oj 1X1 n" rri CD iT'l i"C S 1 1 _i i iTi iTi ij'i iTi iTi iJi iTi iTi it'i iTi if: iTi r '-• 1 iTi U'l iJl ijl <T\ iTi <T, iTl iTi iji iji IT, iJ i ij"i 1 1 r 1 iTi U'l iTi iji IJl iTi iTi iT'i iTi iTi iTi |T| iji 1 1 iTi >T, iJi iji Ui ijl <Ti iTi iTi iJi iTi iJi 1 1

iJi IT, iTi cr-i iJi iji iJi CTi iTi ij*i Iji iTi 1 1 ei iZi' iS El iQ El 13 d El E' El lEi E

El iXi \r f^- c 

1X1 in LTi IV Ej Q CJ ri m iJi Ei

El i.n CJ E 1x1 '.X CTi Oj

El iTi iTi i7\ iTi iXi Oj 0:1 i;d r^- El El iP E IS E iX> GO El El Ei E

>t ^• •X

\<- 5.J >^ 1 E ivi Q E E El El I'D E El iti iVi E 1 E IT; ro in E LO E Ul El in E in El

q 1 E Ci (Ni ro irj ITi 'JJ

163
9

•X1^

LU I—

r ? !- 'r^ •:X 3 IX 5: z: X 2: I— i— o o

IJJ LU CO 2: IJJ IJJ !J-I Ul :X !— 1^

1-^ LU i— I— 'X 2: CO 0:1 ijl (J'l t-j •!

IS IS IS IS IS IS IS s s IS IS i 2:1 ^1 j LL' U-i U_i Ll! LLi LU UJ LU LU LU LU LU i CO s f-1 IS IS IS IS IS IS IS IS IS IS IS i _! i IS iS IS IS IS s IS Q IS IS IS IS 1 _i _! 1 S IS IS 'S IS IS m 'S IS IS iS IS 1 LiJ IS IS iS IS iS iS IS IS IS IS IS IS IS ! 1 IJJ r 1 in IS iS IS iS IS IS IS iS IS IS IS IS 1 U_ i r-.j IS s iS s IS IS IS IS IS iS IS' iS S i IS IS s IS IS IS s IS IS IS IS IS 1 ^X1- a I 1 01 (X i LU s IS IS IS iS IS IS IS iS iSi IS IS IS 1 1^ ! 2: 1 1 _J

iS- iSi iS iSi 13 IS 3 '21 i 1 I LJ LU L!_i LU Ui LU Ijj LU LU LU UJ UJ LU

is 13 s iX 1 • IS IS IS IS 13 13 13

_l 1 IS IS IS IS iS IS IS iS IS IS 13 13

_i i s IS IS IS IS IS IS IS iS iS §

IS i s iS iS i-S •s s l~l IS IS iS 3 1 IS IS iS IS :S IS IS IS IS IS iS 13 3

c; IS s IS iS IS IS 13 IS 13 IS 13 iS

iS 1 0>! 1 IS iS i_o iS IS iS IS IS IS 13 iS 13 IS

UJ

UJ

111

UJ

iS IS 13 iS iS IS 13 UI IS 13 iS IS

iS s iS iS Si 13 iS IS 3 3 13 13 3 i ^ 1 LU UJ LU LU LU LU LU UJ LU LU LU lU 1 I fS I iS s IS IS 13 13 S IS IS 3 iS 3 1 CE I IS IS iS IS 15 IS 13 3 IS iS i3 IS 13 1 2: i IS IS IS 13 13 IS IS S IS IS iS IS 13 i lii 1 i Zj i S IS IS 13 13 IS IS IS 3 13 3 iS 3 1 1 1 13 IS 15 13 13 13 iS IS 13 3 IS 3! 3 1 IS 1 1 2 i I'^'i iS IS IS iS 13 iS iS 13 3 IS 3 3 1 IS IS 13 iS IS 13 iS IS 3 3 IS 13 3 !

iS iS s iS iS iS IS IS 13 3 iS 3 3 1

iS 1 3 3 iji r-_ CO 1

0:1 i£i Hi i 3 r- ro O'l 'D m- ro ro !-0 \Z 1 13 IV IT; O-i 3 03 LTi ro IJl r- in ro 1 3 CTi IT, iTi 3 iTl CO Qj f- r-- -J

iS 3 3 iS IS 3 iS 3 3 3 3 iS 1 >i 5: 5-. ?s 5-; ?£ 5-" lii ! 13 3 3 3 3 3 3 3 3 3 3 3 13 1 3 ITi 13 ITi 3 UO 3 in 3 LTi 3 LO 3 3 1 3 3 iM i?.i ro fTi rf uo in I.D

164
cc

LU

UJ

UJQi

IIjj

•x

2:X

I-g

•I

UJ

:i ri la

2: z z: u- Li_ q: o I— I— a n

UJ 1x1 01 71 LU UJ lU o X Qi a: I— « ^ ui I— I- '3: 2:

(/) O'l Ul 0"! 1-4 US

u;

Q_

J3o

J3

'JJ

^2

z:

0") 1 Gi El El El iS El El El E E El E

i_j 1 UJ LiJ UJ IJU 1 ' 1 UJ UJ UJ UJ Uj UJ 1 I I'D IS E El El El El E El E E E

..J 1 1^1 13 E El El E El El E E El

.J 1 13 Gi E El El E El 1 E El El

iTj 13 E: i El ' El El E E E El

r I El El E El El i El E El E

Ei li E El E El E E E E E El cs:i

C 1 IS El E El El El El E E CD c:i E

oj ; iPnI ! CD El E El El El El El E E E El CD E El El E E 1^1 E E Gj E E El X i! UJ UJ 1,'J Ixl U.I UJ IJJ UJ UJ u.; UJ UJ ixl E El El El E E E El E Ej E E E

._! i El E: E El E El El E El E E E E

_i 1 E El E E iTi E E El El E E E E E El I'M E El E' E El E El El E E

UJ 'z: i iTi El El El E E El E E E E E M E El iTi El iTl El E E i E E El E E El E El El Gi E E E CD El

IJT

UJ El El E' El El El E E E E E

_l

li.

LUO

a;

CKUJ

El E E E E E E E E El E E E

IZ 1 UJ Ui UJ UJ LU LU UJ UJ UJ UJ Uj UJ UJ El i El E E E E El E E E E El E E E E E E El Ei E E E E El E E

._i i E^ E g E E E E E E E E E c:i

._1 1 El E E El El E IS E IS E E G"i El Gi i E E E E E El E E E 1^1 'r ! E El E E E E E E S E El E

El E El El El E E E E E E E E

El E El El El 0 E E E El E E El c

fj 1 El 0-J E iTi r-- Oj 1

Oj i.£i iTi

X 1 Ei U"i pl"l Oj i.£i U"J r<"i fi

11- I 1^1 i^- rJ E lO ro iJi r^- LTi 1 El iT. iJi Ijl ij-i ijj 0:1 0:1 IJJ r- r>- r-- _J

._! E El E E E El E E E E E E

y. 3-^ >i K: E E E E E El E E E El 0 E E E in E LTj E Ln E in E i.O E IT' E E E ^-J p'l L" 1J-. 'Xi

165
3 El £3 El 13 E'

-T^ 1 O ! LU IJJ UJ IJJ LU IJJ LU UJ UJ LU U-! U-l LU CO i3 i3 i3 El iS 13 13 E- i:;J _J 1 13 13 i3 E' El Gj Q',"i _! ^ 1 Gi i5 13 13 El 13 13 13 E' El 13 13 LU E' Q 13 El El E) El El E' El 1 Ui Ki i3 13 El El 13 El 13 13 El

Ll_ 1 r-'j IS 13 El El El 13 El E' El 13 > ! ^ 1 G' El 13 13 El 13 E El 13 El 3 13 •X 1 ( U'.f Q f CE 1 LU 13 i3 E '3 El 3 13 •3 E 13 E' i3 13 o

CO

LU

1^LU

-C LlO I-LU 2: LU o 'K iX- —' LU h- CO (D <Sl U

UJ

a.uo X

LU

i:a ql lii

7: T.

LL. \y- 1- o 3

UJ iJ") IXl LU

ii: I- la

Ix

x

01 « •!

J3

UJ 1 13 13 Ei 13 i3 13

_

13 13 El El 13 El El 7- 1 El 1 Ll.1 IJJ UJ UJ LU UJ LU LU UJ UJ LlI LU UJ El 13 13 E' 13 El El 3 13 _J 1 El El El El 13 i3 El 13 E' El El 13 E'l El 13 El 13 13 El 13 13 El 13 El E' 13 E '3 El 13 El El

El El El 13 El E) 13 El El 13 Et El E) El 13 13 E' El 13 E' I i3 El El 13 13 13 13 :3 E El 13

13 El 13 E E ^ 13 El 13 El i3 El El

•Xa

LUat

LU

I-

•XOl

li: O

11:

LU 0 1 LU 1 1—1

Ci i 13 13 E 13 13 El 13 13 El 13 13 13

UJ i 51 1 1 ~r. 1 UJ UJ LU LU UJ l,U UJ UJ IJJ UJ LU LU IJ-I I El i El 13 i3 13 El El El 13 E 13 E> X 1 El 13 13 El El 13 El E 13 IS 13 13

•7* j El IS 13 El IS IS iS El iS 13

o; 1 1 1 13 13 '3 13 13 13 fSi El El iS El i3 13

_i 1 El 13 i3 !3 El IS IS IS IS E' iS El i3 1 T. 1 13 E El 13 El 15 13 13 El 13 El iS 13

13 i3 El 13 El El 13 IS 13 13 El iS 13

13 13 El 15 El El 13 13 13 El 13 13 i IS i?.l iS cn OD i.£i iri

X I IS in DD in vT ro ro

U- 1 IS IV ITi CJ on Lfi fO iJl in 10 1 El iTi iTi iTt iTi El in 03 E E) El El IS IS El El E El Ei 13

^4 5.V

K j.<- E- i3 13 13 13 El E 13 El !3 13 i3 IS

El LT. El in iS IJ-J El in 13 in El U-i El

iS •3 1—i

C-.J CM r»:i f'l ij~.i tn iXi

166
•a:

.3

z:

UJ 1- m Qi UJ 5 iXi S

2;X

UJ

CO Wf w)

1— o rj LU UJ _ pd i— I—

P 'O: X

01 I 1 1 1 1 ~ C' iS i3 IS 1^' 'S s iS iSi iS IS i3 1 1 O 1 Ll! LU UJ LU UJ LU LU LL: LU UJ IJJ LU UJ

IS '3 IS iS IS iS !S IS iS IS iS iSi 1 1 _J ! Q iTl O IS IS ;S iS IS iS S' iS El iS 1 1 1 IS iS IS IS iS s iS iS 13 IS

iS :S IS iS *s IS !3 IS s i3 IS i 1 r 

:S IS iS iS IS 'S iS IS iS IS 1 i 1 iS iS iS IS IS IS IS iS iS IS IS i ! f>j i IS iS iS iS iS iS IS IS iS IS iS 1^ i3 1 1 i>.; ' S ^ IS IS IS 13 IS IS IS iS IS •s IS 13

LU

IS IS IS !3 i3 S is 'S 13 IS IS i3 IS

O I LU LU U_i LU LU LU LU UJ Lul UJ LU UJ

13 IS i3 IS i3 iS 3 i3 3 |3 I''- _J 1 i3 13 IS 3 iS 13 iS i3 IS iS i3 iS

_! i 12 IS 13 IS IS' iS 3 IS i3 13 IS 13 iS

t"^ iS 13 IS i3 i3 iS i3 13 13 i3 IS iS '3 i3 s iS iS i3 IS i~ 13 IS 13 IS 13 i3 i3 IS 13 '3 i3 iS 13 i3 IS |3 IS

IS 13 13 iS IS 13 i3 i3 13 IS 13 iS

iS :3 i3 3 IS i3 i3 i3 i3 13 13 IS

•X

(k.

QLO

a:

LU

LU ! IS iS i3 i3 IS IS IS iS iS 3 iS ^ I 1 11 i LU LU UJ LU LU LU LU uJ UJ ii.! UJ LU LU 1 C 1 13 IVI iS iS 13 IS IS 3 iS 13 iS i3 iS

•3 1 13: i3 13 iS 13 IS IS 13 iS i3 13 i3 iS

z: ! : _! 1 iS 13 13 iS Iw 1—1 i3 3 i3 13 13 i3 IS

iX t 1 _! 1 IS 13 i3 IS 13 i3 iS 1^ 13 13 13 IS iS 3 1 13 13 13 iS iS 13 iSj i3 i3 13 13 13 13

o:i 1 1 r i CD 13 IS IS 13 13 13 iS i3 13 3 iS

iS 13 i3 IS 3i 13 i 3 i3 13 3 i3 13

iS 13 13 IS 'S 13 13 IS iS IS 13 iS i3

i_j 1 15 L-J iS O-J iTl r- CO 1C~i iXim i IS LO ro co i.£! ir- {>-) ro

LU 1 i3 r- un CI 13 CO uTi

n iTi r-- LO ro ! i3 >T-. Ui iTi ij-i O'J iS O'J on n-

_J

_J 13 IS 15 i3 13 13 13 iS i3 i3 13 iS K 3S K 5^ 3<: 13 13 13 IS iS 13 13 IS 13 iS 3 i3 O

IS U"i 13 LO iS U""j 13 IS i3 111 13

iS Cm r-'i ro u"i lil •-D

167
21

Q: IJJ Iif T ~i Gj '-T o 1-1— o ~: m ijj iTi z: m ijj lu _

i_j

X q; ii: !— 1-4

•-^ LLi I- I- :r

LTi iin U"! 1X1

M <i it K' CD 13 13 El El E E E E El El

G! !3 i2 ijD ei El lij El El El El El El

2: ! 0 1 Ix) IjJ LU LjJ LU UJ LU LU IJJ LU

U UJ Ij^ Ul iTi IT: Ui 0"i Ul Ul IJ 1 Ul Ul Ul Ul Ul

._J 1 iT. U'l ij\ iT-i Ul Ul Ul iTt Ul Ul Ul IT Ul

_i 1 IJ : iJi cn Ul Ul Ul Ul iTl Ul Ul Ul 0". Ul

0"!

m cn Ul Ul IJ-l Ul Ul Ul Ul Ul Ul Ul

.z; i IT) iTi Ul Ul Ul Ul Ui Ul Ul Ul Ul O'l Ul

iTi lJ-1 lT| Ul Ul Ul Ul Ul Ul Ul Ul Ul ij 1 Gj 1 iJi Ul iTi Ul Ul Ul iTi Ul Ul Ul Ul Ul Ul

OJ 1 iTi Ul Ul Ul Ij-i Ul Ul Ul Ul Ul Ul Ul

T'J 1 IS El 12

Qd El El El E El E Gj E

El Ei E E E El E El E E E E E 0 1 LU iJJ LU LU UJ ii! UJ UJ UJ LU LU UJ UJ

El El E El E El E E E El E E E

.J 1 El El El El Ei El El E E El E El E

_J 1 E E E E El E E E E E E E

El El El El E E E E El E El E

UJ El El El E E El E E E E E E M El El El E E El § E E E E E E

•-J- i E' E E El E E E E E E E E E

CO

LU

_J E El El El E E E E E E i3 E E Ea

UJ

a:

LU i C 1 E E E E E. E. E El E E E E E y !

UJ UJ LU :jj LU UJ Ixl LU UJ UJ LU UJ UJ 1 i_j 1 El E E E E E E E E iTi E El E E I E E E E E E E E E E E E E X 1 1 -J i E E E E E El E E El E E E E

IJi 1 1 _1 1 El El E El E El E E E g E El E 1 t E E E El E E E E E E E E

01 1 1 ii: E El E E E El E E E E E E E E E E E E E El E E E E E E E E E E E E E E E E E E El r 1 i E C4 E i."J iTl r^- Oil 1

Oj 'Xi Ul I 1 E LO rn UJ i.£t LO !<-< Ki 10

U- 1 El r-- LO r-j E Oil LO iTl r>- tr.' 10 1 E ijl iT) Ul Ul 0:1 03 Oj 03 rv r-- _J E E E E E E E E iSi E E Ei

JS ^^

K >i 5? E E E E E E El E E E E E E E in E LTi El E LH E Lfi E E Gi i?-J ro LTi in i.n

168
I

CD El El Cl iD Cl G' Cl

GG El

G

d Gj G' El Gi Cl Cl Cl Gi Cl

G El Id

X' LU Li; UJ UJ IJJ UJ UJ UJ Ixl UJ UJ Ijj l-Ll I—

iTi iTi iTi iJi iTi iTi iT'l iTi iTi iJ'i iji iJ'i iTi

._J iJi iTi iTi iT iTi iTi iT'i iTi ij'i ij'i iTi iTi iTi

'Ti iTi iTi iJi IT Ql iTi iTi O'l iJi iJi i.'i 1 IT: IJ-, ij'i iTi ij'i IJl iTi ij-i IT: iJi ij-i IT-. 'Ti iTi ij'' iJl iTi IJ-1 IT; iJ-i U'l iTi iTi IT- iJi IT. iJi iTi ij'i O'l Ijl iTi 111 iTi U'l iJi iJi

iJi IT, 0-i ij'. iTi iTi IT' iTi IT IT: IT: iTi U'l

C'-J

I'-J 'Ti iT, iTi IT. i.Ti iTi IT: iTi iji IT, IT, iJl

<Sj Ej El El El Cl Cl Ci Gi c:i Cl Cld

Ei El El E El Cl

Q Ci El ElG Cl E!

X 1 CO i O 1 LU LU LU LU LU UJ LU UJ LU UJ LU IJJ IJJ ' ' i El El El G El lEi G G Gi Cl El Cl C i ._! i Cl G' Ei Cl Ei G' G G G G Ei G _1 1 _! : Gi 13 El Cl lEi El Cl G Cl G El G LU 1 '~' i Gi El g:i Cl iG El G G EJ G E G IS 1 UJ 1 !EI 1 El Ei El G Gi El C'l Cl Cl G G '5

LJ_ 1 r\j 1 El El El El

G Cl ElGG iZjG E G I>~ 1 •'d- i El El E! El Gi G iS G El G G G Ci

<X 'I 1 iji 1 ^ - 1 UJ 1 El El El

G

G

GGG ElG Cl

G iG

u-» ft 1 _j 1 Z 1 ' 1 Ql 'U. i U_ 1 C3 1 UU ' 1 E 1 CO 1— : i— X 1 1 _l O 1 IJJ r3 s: 1 _J

tJ3 1 ' ' UJ ^ 1 Q£ Lk^ 1 UJ d 1 El Ei El

G El El El Cl ElGG El lEi

m 1 ^ i 1 yj

X 1 LU LU LU LU LU UJ LU LU LU UJ LU UJ LU

i_j 1 El El El

G El ClG i.i.1 El ClGG Cl

UJ 1 <! 1 El El Gi

G

G Cl ClG El Cl

GG

G

a;X 1 X .-J ! iS G'

GGG iG

G ElG

GG

G Ck: UJ I— 1 q; ._J 1 El Ei G Gi G iG G G G G G iG Ly @ UJ 1 '—' 1 13 G Gi G G G Cl iG G G El Cl G UJ i_ H 1 2_ 1 CO H 1 El Gi G El G G G Cl G G El G El

Gi Gi

GG ClG Cl

G

GG

G Cl

'z: Tz XI

U- Lo- q; 1 - » i_i H~ 1— i_j :d I E El El

G El El El ClGGG El

G Lu UJ no 1 X UJ Ui UJ 1 Q >' li: Lt !- - M 1 •—' liJ 1— K 'O: X 1 W1 ij) Ql i'_M O 'CE 1 ' 1 * 1 CJ 1 UJ 1 C£l 1 Cl i o

hlU El i?i Ei iM iJl 1-H CO 1

CQ i.£i iTi

.:X El LP f\_ p-i t.£l Ij't y,~i U- El r^- m C] G IJJ in i"0 Ln o j El iji iji ijl iJi o;i Oj CO iV 1 -J in El G G G El G G G G G G o •X1 1

(T3

UJ

llL 1—

LU

1—X 5i

n

K ?J >j CK §

IS

G

G GiGGG iGG

G Cl El

Ul

G in Cl ^r^

G LT)G IJl

G LO Cl

nco El El 0-1 OJ l-'l rn U'l Ln 'D

li: LU

169
I\jj 1jj1 IS Ei iX El Gi El Gi El El iX El Gi 1 jj 1j -7-

rr: iXi IX iX iXi Gi iX El Gi El iX 1X1 1 1 LU l-U UJ UJ LU IJJ LU UJ UI Ijj LU Ijj UJ i j j CO 1" ! I'D CO CO m Qj CO O'i ij'i CO Oj CO i ! 1 _i iji 0 i iTi iTi iTi ij) 1X1 iji IT. lfi if, iTl iJl i CTl 0"! Ui IJI Ui iJi iJi IJl iJi iJi iT, iTi iTi 1 O"; iji iT. iji iTi iT-. iT iX ITi G"i iXi 1 i 'd iTi 1X1 iXi iT| iTl iT'i ij, Ui iT^ 1T| iJi Ei i C'i n\ 1X1 Ti •Tl iJ1 iT-i IT, iJI iTi iTi iJi ij -1 1 iX' iTi IT. iJi iJi IJI IJl iTi iJl iTi iTi 1T1 U'l 1

C'-.i 1X1 iT( iJi ij-i IT. IJl Ij'l iTi ij-i lfiC 1 iJl C'l 1 1 -

Gi iX iXi El El iX El El iX iX Ei Gi Ei 1! j iXi iXi El E E iXi iX Ei Gi iX •XI E El 1 j j [ 1 iX LU LU U-i UJ LU UJ Ijj LU UJ Ijj LU LU UJ i LO j 1X1 iXi i~ iTl El 1X1 Gi El G Gi Gi iTi iXi i 1 ! ! J3: 13 El Ei Gi iX iXi E E iX iS IX E i —1 ! _j IX 1X1 iX El li^' Gi iX IX E' Gi Gi iX E ; LLi 1 ] 1X1 1X1 Ei iX Ei iX E iX Gi Gi E 1 Lij ' i; El El iS Gi E iX iX Ei iiifi iX Gi Gi El 1 Ll_ .-\ 1 ^"^J ! El iS Gi El Ei El iXi Ci iX iX iX Gi i r>*" ' d iX E 1X1 E' E El iXi iX iX El iX E i (X i H- O i

U'.i i

LU i iXi El iX iXi Ei iXi Ei El Gi El El iX Ei 1 1—> I—1 1 _j i 2: 1 D' 'I i Li_ ! O 1 Ll_ i 1 1 1 01 H i j H X ! 11 — 1 _! LJ 1 LE xj z: 1 CO 1 I Lli ! r 1 j Ol Qi 1 UJ j 'X 1 ij

iXi Xi El iX iXi E iX Ei iX iX El Gi El 1 (—1 LU ! G >- 1 j x: ! LU UJ LU IJJ UJ UJ LU LU iJj (jj UJ Ijj UJ ; > ! ^ 1 0 1 X' El El Gi Ei El iX Ei iX iX Ei E El 1 LU i j iX El El 1X1 E El El Ei iX iX iX CJ Ei 1 j ._] i El iX El i2 IX Ei iX iX iX iX El E iX 1 Ct Ijj i— 1 j 'X Gi El iX iS El El El iXi Gi Ei Gi Gi 1 I— LU Qj q; IJJ 1 1 iXi 1X1 El 1X1 Gi E El E Gi Gi E G Gi 1 Ij ^ ^ :± ; j i: i El iT-i El iXi iX El El El Gi iX iX iXi G 1 Ct X XI Qj X 1 iS 1X1 Gi 1X1 iXi El El iX IX IX G iX Gi ! 2Z 'T X i Lu Li- 1 i i_i 1— 1— i_i :_j 1 El El El E Gi El El Ei iX' El El El iX 1 LU LU CO 1 1 z: LU ;u LU i O y Ql Ol \— \ ~i 1 UJ h- i— X X ! j CO 01 ul CO X t j CJ 1 LU 1 CL' 1 iv CL 1 O 1

i_i iXi i?J iTi iaJ iJl -rH f'- iX 1

UJ iXi Ui i •X Ln |\_ fo Oj i.ri Lfi ro ro r''~i ! cn ; lj_ El Ln C-J El ilj \r> ro '' ' iTi LO ro 1 El iTl iJi IJi 0"! CO IJJ 00 IJJ T'- r- r-- r-- 1 r-H 1 -J_l iS Ei Gi El G Ci Gi Ei iXi Gi Gi El i O) 1 •Iu

-Q 1 ^

Ta ' .

h-x ?? Ji >f Ji 3-: ?? ?4 ?4 Ji J? J;-- 1 li: El El El iXi Gi IS iX E. Gi E. iX E Gi 1 El LTi E El IT! iXi LO Ei IX IX IXi IX ! ct: a E. iS fv i?-i ro •^r •rt LO 1X1 1

tx 1

LU

170
ei El Ei E El E El Ei E' Cj E' S 1 UJ UJ UJ 111 LU UJ UJ UJ UJ UJ UJ UJ Ci El E El Ei E E El Gj E a -J 1 El E E lE E E El Gj E

^! 1 El i;;i El E E E: E E El LU El iJO El E El El iTi El Gj E ! UJ 1 i2 13 El E 15:1 E El El E g g:i E

u_ ' r-'j IT, Ci El El E El

g El E E' El El g;i -J- i 13 Ki d El El E E El IE Cj El c:i g; cc i 0" i-o: § 1 ! IJJ E El El E E E E E E E E

ft i 1 ._1 2: I i '"^ E

I- Oi p:: ct: UJ 1-

o: El ixi 'O: 2: 2: 2: U_ Lj_ Qi Q K 1- O El UJ UJ ij-i 7: Hi US LJ

01 (J") O'l ilTi i3 'X

QJ

U.I 11 E El El E El E) c:i El G'l Ej El G3 IE 1 E E El El El El lE El 13:1 IE El E 133

.z: i c 1 I.U UJ UJ LlI UJ LU UJ UJ UJ

!<-) P' 1 to

mm i?-i r.i i:-j Ijl iTi IT. El iTi ri'i iTi El iTi iTi iTi IT. _i i a-; IJI iJi iTi iTi ij-i iJ 

iTi iTi rJi 0-! El a\

Ijl iTl IT, n-. iTi IT' IT; iTi ITl C' ITl El iTi i~ : iTl rji ITl O'l ij"; iTi iTi Ci iT-i iTi iTi IT

G-i lT( a>i El a-i iTi Oi IT iTi ITl iTi iTi 'Ti E 1 iTi iTi iTl iTi a-< IT, IT: iTi iJ-i IT: C-i 1JI •Ti

C'J 1 1.'1 iTi 0'. iTi El El iTi iTi Oi IT: iTi rn IT: El E E E lE El El G'i E 1.X1 lE El

IJJ Oi.

UJ

:jj

UJ 1 d 1 El E El E E El E El E ij-i E E 0:

UJ 1 1 2: 1 UJ UJ UJ LU UJ LU UJ UJ UJ LU

U LU l_iJ /.. 1 1 0 : <X) E El E E E E E E E E Gj E X 1 E E E El Sj E E E g:i E GJ i ._! ( E El IE E IS E E g GJ 13 g:i .T-| E.

S: i i ._! 1 E E El E E E E E Gl Ej lE E E 1 i E El E El E El E E E E g:i E Ei

0:1 1 1 i: 1 E E E § E E E E g:. El (Sj E E E El El E El El E E El E E El E E E E E E E E El E E E E

El E CI iTl 0:1 Oj i.£i iTi E r- o;. i.£i iJ') I'-i r'.i LTl OJ E S ro IJl r\- in ro g iTl iTi iji iTl Oj 03 El 3 !\- r-- E E 13 E 13 13 13 E E E E E I 1 J-i ;\- >; ^^ >? >: QC i E E E E E El E E E E El 1 El U.I E E ir.i E UM E E E E 1 E E Ci I'-i Ln L'-i i.n

171
U.I -1a

Xg

RE QiI

i-Li >•

LU

OC

\~ uj

g q; ijj iJJ Qi S :d ixi 'X X. n -21 LL

i.J i- 1- 0 X)

LU LU if! §XliJ

LU IJJ LU

tr.i ixi

Q ' X

u

UJ

QlTi

LU

1-

UJ

UJ

LU i iXi IS

d IS IS IS iS IS IS iS iS IS iXi 1 \ i 2: i LU IJJ LU UJ LU l_U UJ UJ UJ LU UJ UJ UJ 1 1 1 i IS IS 13 IS 1X1 IS iS © IS IS iX IS IS X i iX IS iS !3 iTi <s IS IS IS iS IS IS IS

z: 1 1 _! 1 loli El iS IS Ci iS IS IS I.S IS CD IS

Oi I 1 _J 1 IS IS IS 2 IS iS IS Gi iS iS

g

XI 1 iXi i

IS IS iS IS IS IS IS IS IS IS iS

0' i 1 H 1 IS IS iS iS iS iS IS IS IS IS iS s

IS IS IS iS IS IS IS IS IS IS iXi IS

IS IS Gil IS IS s IS iS IS iS iS iS iS ]j IS 13 IS IS 1^1 iS 13 13 13 i2 IS iS IS ] IS 13 IS iS IS IS IS 13 13 iS 13 i3 iS

2: 1 l_l 1 i-U LU LU LU LU LlI I-U UJ LU iJj U-i UJ LU 13 iTi IS iS iTi iTi Ti iT, CO CO OJ r- r-

_J i iTi iTi iTi Ti CO IT CO CO 0"i O'l GJ co co

Ijl iTi Ijl Ti IT a< IT iJi IT; IT iT, IT. iT

iTi IT IT ITi IT iTi CT iT IT iT-| Oi IT IT

r i iTi iTi IT. 0"i IT ITi iTi IT IT IT

U 1 iTi iT

IJl Ti ij> iTi iT iTi IT iT IT IT iTi iTi iTi IS i iTi iT^ iTi ITi iT IT IT IT IT O'l Ul iTi iT- Ti Ti IT iTi iTi iT T1 IT 01 iTi IT 1; , IT iS IS 13 iS IS IS IS iS iS IS 13 13 IS

iS IS 13 13 13 IS in El El IS 13 El 13

IZ '

i_"' ' UJ LU 1x1 U-I UJ

m LU Ll_l LU LU UJ UJ UJ iX iS 13 13 13 IS iS IS IS i3 13 IS

_j 1 13 iS IS |3 13 IS. is El El iS s

.J 1 13 IS iS 13 13 IS 12 El iS

g El 13 13 IS :3 13 i3 IS IS IS IS IS 13 1 --"i i3 i UJ 1X1 IS IS IS 13 iS IS El IS IS 13 El 13

•3 li.. 13 13 13 13 iS IS IS 13 13 IS 13 ! IS 13:- 13 iS IS iS E: IS El IS IS 13 ; 0:. i LU 13 13 IS IS iS IS IS IS IS IS 13 El 13 i _j0 1 iS CJ El IT 03 1

00 iXi rr 1 13 ro iT ijj \---) I'd U_ 1 El r^- ID i?-| IS CO m ro 1—1 IT r-- IX- rvi 1 IS Ti iTi Ul iT 0:1 OJ Oj 0:' r- r-

_J

_J iS 13 iS IS 13 13 13 13 13 13 iS 13

'X 1 J:; ?4

M 3-; Jf -;i ;-iH 1 E 13 iS 3 3 IS IS IS IS IS IS iS E 1 (D Ul IS iTi iS U"i El in IS LT.i 13 U^i IS

13 i iS iV' V-i f'l ri-| -i- Ij"; L!"l i.D

172
X

••I

:X =1

m -x 71 1. X

I- i- o :d UJ LU i n

-z. UJ

m !JJ

aX 111 ill I— o ^ UJ I- !- x z: lO ij.i 1-0 CO 1 IA.1 1X1 1.^1 I—

IXI lA-i r~i 1.^1 \\ (Xi 'X i_j.i UJ iXi 1.^ iX

'X) 1 LL: LU UJ ijj LiJ^ LU UJ UJ ! , 1 1 I i Ijl Oj f- IT, f:, r>j iTi 0:1 I.Q

...J 1 LO Ul KTi LTj ij-i w, LTi xr •T ^•

rji D~i iTl iJl IT, a-. 0-, iTl iTi iTi IT. Tl iTcr. a'l IT, l.:i Cn iTi d, ,T, IT, IT; ITl Q: k: i iji iji iT, 1 

G", a\ iTi iTi cr. iTi iTi ,Ti J-.

cr, iTi iT, iT, G", iT, iTi iTi ITi iTi iTl iTi iTi iri IJI ij, IT, ij', IT, iT, iTl ij' T, ,T:

r-j 1

IT, U\

U ; iTi Q'l IT, iTl IT, Qi ij"', IT !

iX iXi iXl iX iX' iXi iX 1X1 iX iX XI iX; j:;\

iji-i C:..i Iji.' IX^ 1-1.1 iXi IaJ i-i_i IX iX' 1 'X' iXi IX 'Xi iXi XI Xi Xi iXi i-i.' jT'i \\ ' ^1 i LU LU LU LU LU LU LL, LL; UJ 1 1 UJ iiJ \ IT iTi IT, C, 0, U- iTi CTi IT, iTl iri cn 1 ij'l C'l iji C i iJi iTl iT, 0"-, IT; iTi :T, 1 -J i iTi lTi iJi IT, iTi iTl IT, iTi Tl "T, iTf IT, i IT| lT| iTi IT, iTi <Ti 0", I"'"', iTi IT, T^! iT, 1 UJ £ 1 ij! iTi lT| iT, IT, iT, iTi iT, iJi iT, IT, 0"-i iJl 1 IT, iTi iTi IT, 0 , IT, IT, iT, iT, ,Ti :Tl iTi ! ' —

i ij'i iJl U, iTi IT, IT, (T, IT) ij. cr-. C 1 IJ: i 01 ij. IT, l~i T, IT, iTi iT, iTi IT, iTv !Ji uv 11 LU 1 _!

IT! iXi IX iXi iXi iX iX iX (Xi 13 iXi -X- 'Xi

IS

UJ

UJ 1 M 1 iXi Xi Xi iX iX IX iX IX IS iX IS iXi iX ^ i UJ i_U LU LiJ Ll_l LU LU LU LU LU LU u UJ ! l._: I iX iX iX iX IX CD IS IS iX i_j-i iX IS

•X ! X Xi 1^1 iXX •Xi iX E. iX iX iX iX iX, ! _J i ,T! iX iX iX iX 'X is IS iX Xi XI IS E i 1 _) 1 iXi iXi 1X1 IS iT^i iX IS X ,T; iX iX •XI g X 1 iXi IX G3 iX iX 'S d IS iX iXi iX iS

U") 1 iX iX (S 13 iX IS iX IX 5 iX iXi Gi

IX ui El IX iX 15 iX iX

Q iX iX iXi iX

iX 0 iX IX is iS iX XI iX Xi iX iS

LU

tK

LU

iX 1 IS .">J iX IT, CO -T TT iX iTl •I 1 IX Ul r- fO ijC' U", ro ro

1J_ 1 Xi LO Xi ITi ro iT! bO ro 1 Xi ij, IT iTi iT, iX 0:1 03 Oj iV r.

_i iXX IS 15

X IX

X iS iS IX iX

•I 1 >i >; 5' ^i J4

111 1 IS iXX iS IS IX iX iTi ID iXx iX 1 El uO iX J) iX iS LI iX LH iX u-i X

QiiX 1 iS '5 v\

M xf LO ip

173
APPENDIX II

A PROBABILISTIC FORMULATION OF THE NON-UNIQUE ACCESS PROBLEM

In this appendix, we describe the theoretical basis of the probability

model discussed in Section 5. The problem is to calculate the probability that a given retrieved record which has been accessed by a combination of retrieval keys such as name, date of birth, etc., will

indeed correspond to an individual whose record is requested. It is to

be noted that this theoretical development is completely independent

of the retrieval algorithm itself. It supposes that a certain record

has been retrieved and that it has certain characteristics which match

characteristics known by the inquirer. The question is then: what is

the probability that it is in fact the record desired by the inquirer?

Note that there is some conceptual difficulty in even defining precisely

when a record is, in fact, the record of a particular person. This is

because the record may not uniquely characterize a person or may contain erroneous information. There are also attributive values which carry

more weight than others in identifying a record-person correspondence

(e.g., name). For purposes of the discussion, however, we assume that

it is meaningful to say that a record matches or corresponds to an individual, i.e., is^ the record of the individual. This proposition

or event we designate as 'M. '; that is,

The second event to be specified in the probabilistic formulation is that

a record contains a particular attribute value for the jth retrieval key:

It is useful to define a third "reference" event that defines the universe

of discourse or context of the probability formulation. We call this A.

In what follows we can consider A to be the selection of a given record

from a data bank where the mode of selection is not specified.

The basic probability to be calculated is then

M. = a given record matches the individual i (1)

(e.g., who has attributes name = Xp address

= x^, attribute^ = x^)

Kj = a given record has a particular attribute

value for key j (e.g., name = x,

)

(2)

P(M. |Ki & K2 & . . . & & A) (3)

174
where '&' indicates logical conjunction. Thus (3) is the probability

that a given record matches the individual i conditional on the fact

that the record contains certain attribute values on the set of keys

j = 1, n. The basic problem of non-unique access is to select a set of keys so that the probability (3) is near unity.

Let us first solve the problem of calculating probability (3) by studying the case of a single key, i.e., the probability

P(M.|Kj. & A) (4)

By the multiplication principle we have

P(M. |A) P(K, |M, & A)

P(M.|K. &A)= (5)

' J P(Kj|A)

For readability we will omit the reference event A, thus (5) assumes the

simpler form.

P(M.) P(K.1M.)

p(M |K ) = ^ ^—L- (6)

' J P(K.)

The factors on the right have the following meaning:

P(M. ) = the a priori probability that a (7)

' randomly selected record matches

the individual i

P(M.) = 1/N if N is the total population upon which the data bank is

drawn.* For example, if the individual i is known to be a California

driver and the data bank contains all and only California driver records,

then N = the size of the data bank. On the other hand, if the data bank concerns information on adult U.S. citizens, then N = the number of adult

U.S. citizens.

In the complete formulation with the reference event A, A could be con- sidered to contain the information regarding the population upon which

the data bank is based.

175
We next have:

P(Kj|M^. ) = the probability that a record contains (8a)

a specific value for retrieval key j

conditional on the fact that the record

matches the individual i.

For example, if the j " key is i's address, then P(K. |M. ) is the probability that i's record contains his correct address. It therefore

follows that

P(Kj|M^.) = the complement of the sum of the error (8b)

rate in key j and the relative frequency

of omission of data in key j

Note that for perfectly accurate records, we would have P(K. |M. ) = 1.*

The third factor P(K.) is estimated as the relative frequency of the

specific information given by key j in the bank. For example, if two

records are retrieved having the same value for key j and m is the size

of the data bank then P(K.) is estimated as 2/m.

Now if a set of keys j = 1, n are independent , the probability (3)

is calculated by putting the conjunction K & ... SK^^ for Kj in (5) (or

the abbreviated Form (6)) and expanding the result into a product for

j = 1 , . . . , n ; i . e .

,

n P(K.|M.)

P(M.|K,& ... &K ) = P(M.) rr ^

, (9)

J = l

However, the independence assumption is only valid for certain keys. For

example, name and birthdate can be regarded as independent, but not birthdate and year of graduation from high school. Independence also depends

on the conditional probability. We therefore must look for a more general

solution.

The error rate in query formulation is not part of the probability (8)>

which has to do with the probability of the selection procedure being

successful conditional on an error-free query.

176
One approach to this problem is to use some probability machinery

developed by W. E. Johnson and reported in Keynes. 53 There are also

versions of the Johnson work in Carnap.54

We now present our version of the so-called "Johnson Cumulative Formula."

A set of rel evance coefficients or coefficients of influence is first

defined. For any propositions (events) . .

. , K , we define

P(KJK^ & A)

C(K,,KJA) = ^—^ (10)

^ ^ P(K^|A)

C(K^,K2 KJA) = C(K^, K2|A)-C(K^ & K3, KjA) (11)

It is then easy to show that C(Kj, K^|A) has the operator property*

P(K^ & ... & KjA) = C(K^, KjA) jf P(Kj|A) (12)

(see Carnap55).

^'^

The coefficient (11) is thus a coefficient of independence and is unity if

the events Kp K^, are independent relative to the event A.

The cumulative formula is obtained as follows:

Let K be the conjunction ... &K^. Then by the multiplication principle

P(M. |A) P(K|M. & A)

P(M.|k&a) = — (13)

' P(K|A)

Applying (12) to the numerator and denominator of (13) and then multiplying both sides of the result by [P(M. jA)]"-! we get

We use our own notation for the coefficient.

53

Keynes, J. M. , A Treatise on Probability , MacMillan and Co., London, 1929,

pp. 149-155.

54

Carnap, R. , The Logical Foundations of Probability , University of Chicago

Press, 1950, pp. 356-360.

^^ Ibid , p. 358, Formula T66-3C.

177
(14)

,1 C(K,, KJM. & A) n /p(M.. | A) P(K.iM. & A)

[P(M.|A)]"-^ • P(M.|K & A) = —i n \ ,

'

' ' C(K^, K A) j = l \ P(K.lA)

We now use the cumulative formula (14) in the following way. First introduce the abbreviations.

V = P(M. |K & A) (15)

P

= P(M. |A) (16)

qj = P(MilKj & A) (17)

By the multiplication principle, q. is the factor in the parentheses of

(14), i.e., J

P(M. |A) P(K.|M. & A)

q. = — ^

(18)

^ P(Kj|A)

Our problem is to study the expression for V. Using the abbreviations,

the formula (14) becomes

, C(K,, K !M. & A) n p" = —^- ^—! TT q, (19)

C(K^, KJA) j = l J

We now use (19) again, but this time substitute '^M. ', i.e., the negation

of M-j , for 'Mj' in (14). The quantities p, V, and are then replaced

by their complements. We get.

n

1 C(Kt, K |%M. & A) n (1-p)"-^ (1-V) = ' \ TT (1 - q.) (20)

C(K^, KJA) j = l J

178
The ratio of (20) to (19) yields

where E is the factor

C(K,, K\-M. & A)

E = i ^ ^ (22)

C(K^, K |M. & A)

The equation (21) is the solution to our problem; that is, the right side

of (21) is the product of the two quantities, E as defined by (22), and

-(Tr)""\rr(^^)

so that (21) becomes

from which we derive

T

- 1 = EF

V =-i

1 * EF (24)

We see that V depends not only upon the quantities q. but also on p, the

a priori probability of M. , and the quantity E. The"^ value used for E is

usually obtained by independence assumptions .

Note that if

E < 1

then, from (24),

179
V^ > —1 + F (25)

This means that a lower limit to the probability of M^. conditional on the

combination & Kp & ... & can be computed if E £ 1. The value

E = 1 occurs when the numerator and denominator of (22) are equal. In particular, this is the case when the keys are independent relative to

both ~M^- and M. . The smaller the value of E, the greater the ability

of the keys to discriminate.

To summarize: We have three formulas for the desired probability V each

involving a different ratio of coefficients of influence: the formula

(19), the formula (20), and the formula (24). In Section 5 we have

implemented the formula (24) for a range of values of E.

180
APPENDIX III

SOFT-MATCH TECHNIQUES

In Section 5.2, we noted the classical problem of trade-off between recall and precision, i.e., increasing recall lowers precision. But this

arises only in the case where all retrieved records are treated on an equal par and not subjected to further filtering. Our approach to the

problem is to increase the recall and then to provide a mechanism for

additional filtering to improve the precision. In this section we discuss a method for increasing the recall called "Soft-Matching." The

result of a Soft-Match Technique is not only a set of retrieved records,

but also a numerical weight assigned to each record to indicate its

closeness to the query. As an example, consider the case of a query

which is a conjunction of three key values denoted by A, B, C. A traditional retrieval would select only records that matched on all three. A

soft-match technique might be to also select those records that matched

on A and B but not on C, on A and C but not on B, and on B and C but not

on A. These secondary retrievals would then be assigned weights less

than that assigned to a record that matched on all three. The retrieval

could also be extended to tertiary retrievals such as records that matched on A but not on B and not on C, etc. These would be given the lowest

weights.

In this appendix a heuristic weighing scheme is presented for filtering

the candidate records. In Section 5.5 and Appendix II we presented a second weighting scheme based on probabilities which is in fact the measure of precision for a single retrieval. (That is to say, precision

IS the proportion of retrieved documents that are relevent, i.e., match

the inquirer. Consequently, if exactly one record is retrieved, then the

precision corresponds exactly to the probability that the record is in

fact that desired by the inquirer.)

On the basis of the above discussion, we see that a soft-match technique

involves two components: (1) an algorithm for determining a subset of

the data base of manageable size which has maximum recall; (2) a scoring function for assigning the closeness measures to each item in the subset.

First, consider the problem of determining a manageable subset. Suppose

that the retrieval prescription involves n keys

Then let S(K. ) be the set of records which match on the i^" key. In

principle, the subset with maximum recall would be the set union of S(K^),

S(K^). This approach would not be efficient however, so a method

which utilizes the error and omission rates and the discrimination factors

is recommended. These quantities are defined as follows:

181
a^. = probability that the key value for the i key is incorrect

b^. = probability that the key value for the i^*^ key is omitted

e. = a. + b.

1 1 1

(Thus, the complement of e^. is the quantity c^. defined in Section 5.1).

The discrimination factor of a key is measured by the relative frequency

of a key value in the data base. Let R^. be the relative frequency for

the i^^ key. This quantity is estimated for certain keys by the

values given in Tables 5.3-1, 5.3-2; it therefore corresponds to the

concept of retrieval ratio.

It follows that the initial selection of the retrieval should be the

union of, not all n sets S(K^. ), but a certain selection of fewer sets

say S(K. ), S(K. ) (m<n), that has the properties

h ^m

(1) R. X R. X ... X R. is less than a certain threshold r . 'l '2 \

°

(2) e. X e. X ... X e. is less than a certain threshold e . h '2 \ °

The first property guarantees that the retrieval set has manageable size.

The second property guarantees that the probability of missing a relevant

record is low.

The second aspect of the soft-match technique requires the definition of

the scoring function. For this purpose consider that we have an arbitrary

quantitative "strength of match" function for each key. For example, for

a key designating home address, one such function might be

f^. = 1 for complete match

f. = .5 for agreement on the street name, part of the home

address but not on the house number part

f. = 0 otherwise.

1

More complicated functions can be defined in obvious ways. For example,

if the house number partially matched, say it disagreed on one numeral

out of four, then we could score this as .75. The simplest function is

the binary function, '1' for match, '0' for no match.

In general, we see that a score for a key for which f^- > 0 (i.e., a partially matching key) should:

182
(1) Increase as R^. decreases

(2) Increase as f^. increases

(3) Increase as a^ (the error rate in the i^*^ key) decreases.

It is therefore plausible to take the contribution of the i^*^ key to the

total score (in the case that f^. > 0) to be proportional to the quantity

f . (1 - a.)

R.

since this is a simple expression that satisfies the requirements (1),

(2), and (3).

It is convenient to normalize the scores, however, so we will take the

constant of proportionality to be 1/R where

" 1 R = 2 1- (1)

i=l

J. L. Thus, the score for the i key is

We now define the total score as consisting of two components: a positive

component made up of the contributions S. defined above and a negative

component to be defined below.

^

The positive component we take to be simply

n

(Note that this summation runs over all the keys in the query, and not over just the subset of m keys used to get maximum recall.)

By (1) and (2) we see that S is a convex linear combination of the terms

f^. (1-a^. ) where i = 1, n, and so S can range from 0 to 1.

To define the negative component, we see that if a key is error free and

fails to match (f^. = 0), then it should kill off the entire retrieval.

Thus, in the case f^. = 0 we should have a negative contribution which

183
varies as (1 - a.). We therefore take the score when f. = 0 to be

1 1 =-(l-a.)

Since a value of T^.= -1 fbr only one key is sufficient to invalidate a retrieval, we take the total negative score to be, not the sum of the

individual scores, but rather the negative of the maximum value of

(1 - a. ), i .e.

,

T = - max (1 - a .

)

f .=0

Thus T ranges from -1 to 0.

The retrieval scoring function is thus

U = S + T

An example of how this scoring function is used is given in Table IIIThe example deals with the scoring of four records based on values of

the parameters R. (the retrieval ratio) and a. (the error rate).

184
Table III-l. Example of Soft-Match

KEY

NAME ADDRESS SEX

.003 .00002 .5

^• .001 .01 0

Table of Values for R^. , a^.

NAME ADDRESS SEX

Record 1 match (1) match (1) no match (o)

Record 2 match (1) partial match (.75)* match (1)

Record 3 partial match (.83)** match (1) match (1)

Record 4 match (1) match (1) data absent

Table of Retrieval Outcomes

(values in parentheses are those for f.

)

S T U

Record 1 .9900 -1 -.0100

Record 2 .7442 0 .7442

Record 3 .9889 0 .9889

Record 4 .9900 0 .9900

Retrieval Scores

* The partial match example is for the case that one character

out of four doesn't match. ** The partial match example is for the case that one character

out of six doesn't match.

185
APPENDIX IV

FORTRAN SOURCE CODE FOR THE PROBABILITY MODEL

186
FORTRflH IV !>06-^ll SOURCE LISTIHG PRGE 001

C >»(5(<M")<;?(<*>«>K-»t>(o)<'t"»<*'t"<«*>tt*'.Jt< C QUERY SIMLtLATES THE Di^TA BASE/USER INTERhCTIOH

9081 DIhEHSTOH < 1 H . B ( 1 D , C H D , R C 1 1) , S ( 1 1

)

0002 DIMENSION JARV; 1 H , IFLD ( 11 > 0003 D I MENS I OH PiRGS (1 H

0004 DIMENSION SURHM( 10)

0005 COMfiuH IRAN, JRAN- EARY(2?; , PARV<3:i

0005 DATA ARCS <. 1 ) . 239726E- 2^, ARGS (2) / . 833333E- ARGS<35 / . 02/'

000? DATA ARGS (4) / . 02-^, PRGS (5) ^.5-^, ARGSJiG ) / . 600 1^', ARGS (7)

0006 DATA fiRGS ( 6) / . 66b6666/", ARGS (9) --'.000333333/, ARGS ( 10) / . 555555E-4-'

0009 DATA SUR'-IM(1)..SURHM(2) -SURNM(3) ,SURNMC4)/.9e7E-?, .2459E-5, .9S35E2 , .272037E--4/

00)0 DATA SURHM(5) ,SURNM(6) ,SURHM(;7)/4.81966E-5,6.627E -5.. 1.265E-4.''

00 1 1 DATA SURNMC8) , SURHM<9) , SURNMC t Q) /4 . 6 1 97E-4, 7 . S32E-4.. . 3384E-2/

0012 DATA , PARVf 1) ,PAPY<2) ,PARYC3)..-'4.545454E-9,2.5E-7, 1 .E-6/--

00 13 DATA EARY ( 1 ) , EAR Y< 2 ) , EAR Y ( 3 ) , EARY ( 4) . 5 , 1 . , 2 . , 1 0 , /

c

C QUERY SIMULATES QUERY PROCESSING AGAINST A DA I A BASE.

C IT GENERATES VALUES FOR A (J) L THE ERROR RATE IN A FIELD]

C B(J) [THE OMISSION RATE OF DATA IN A FIELD]

C C ( J ) C 1 - ( A

( J ) +B ( J ) ] . . THE COHF I DENCE FACTOR

C R(J) THE PERCENTAGE OF THE FILE RETRIEVED VIA A FIELD, AND

C Si; J) A QUERY SCORE, IJHICH RANGES FROM 1 TO 1"HE FILE SIZE.

C SU) IS NOMINALLY THE RATIO CCD/RCJ), AND IS ADJUSTED HERE

C TO WINTAIN REASONABLE LIMITS.

C THE USER ENTERS THE NUMBER OF ARGUMENTS (FROM 1 TO 11) C UHICH HE LUSHES TO USE IN HIS QUERY. THE QUERY IS TREftl"ED AS IF

C IT REQUIRED A SUCCESSFUL BOOLEAN AND OF ALL THE ARGUMENTS TO BE

C SUCCESSFUL.

C THE PROGRAM LULL TERMINATE LJHEN THE NUMBER OF INPUT ARGUMENTS

C IS SET TO ZERO.

C

C FOP THIS TEST THE VALUES OF A (J) AND B(.J) bJILL BE TREATED AS ZERO.

C FOLLOUING THE ENTRY OF THE FIRST NUMBER—THE NUMBER OF ARGUMENTS

C TO FOLLOLt--THE USER MAY ENTER NUMBERS CORRESPONDING TO THE ACTUAL

C ARGUMENTS. EACH ARGUMENT HAS AN ASSOCIATED RCJ), UHICH IS THE

C PERCENTAGE RETRIEVAL TO BE EXPECTED. THE ARGUMENT NUMBERS AMD

C THEIR ASSOCIATED VALUES ARE AS FOLLOUS:

C

C

c ARGUMENT NUMBER MEANING RETRIEVAL

c 1 DATE OF BIRTH <MMDD) 1/365

c 2 MONTH OF BIRTH 1/12

c

-3, YEAR OF BIRTH 1/50

c 4 STATE 1/50

c 5 SEX 1/2

c 6 STREET NUMBER 1/ 10, 000

c 7 STREET NAME 1/5, 000

c 8 EDUCATION 1/15

c 3 COUNTY 1/3000 (ESTIMATED)

L 10 DATE OF BIRTH (YMD) i/iS,8yo

RATIO

C BEGIN BY ASKING FOR OPriRATOR INPUT.

0014 1 JRITE(G,205)

C 5»o|'.'i<**'»"»5'|o|<>H>M:*5|o»^-HoK--H>)<>t< C NOW EXAMINE HARGS TO START THINGS GOING.

187
KORTRftN IV D0b-01 SOURCE LISTING PAGE 002

6015

66 ib

66 J ?' 68 1

8

6019

8028

0821

0022

0023

QQ24

0025

0026

0027

0628

0629

0030

607 1 6032

0633

6634

0035

6836

003?

6038

0039

8049

0041

0642

6043

8044

0645

6046

604?

0048

0049

6050

6051

6052

0053

8054

6055

085f

605?

0058

0059

0060

8061

0062

0063

8064

6055

0066

REAP (6.216) HrRGS

iF- fHHKGS) 100. 100.

c lcme here to prepare H

10

QUERY SURROGhTE ,

10 I = i NhRGS

(6, 220)

(6.210) J

:i

32

33

34

35

3 b

J,B(J) , J,C(J) , J,R(Ji - J,S(J) , J.JnRVtJ)

-R(NARGS-i-l)

DO 26

UR i TE

READ

A ( I ) =0 . B ( I )

.

C ( I) = 1 . R(I)=hRGS(J)

S( I) =''C( I)/R( I) ) JARY<I)=.J

COHTIriUE

bJRITt (6.. 2 15)

C HOU CALL ON THE MAIN COMPUTATIOHAL ROUTINE TO PREPARE THE TABLES.

r;^;1'-;K.-+<-4<>)<-+:>t<?i<>KH«^=1<>H;h:?t<>f<>f"|5* JARY(HARG3+1) =1

i

N=HARC^+i

yRITE(5,200) NhRGS

DO 25 J=l,. HARGS

URITE(5,245) J. A (J)

25 COHTIi-iUE

DO 56 I = i. 10

C (NARGS+i = 1 . B (NARGS+i ) =0

.

A (HHRG3+1 ) '-3 .. R<NARGS+1> =SURNM( I) S(NARGS+1) =C(NARGS (-1). URITE(5,250)

DO 45 .J=1..NARGS

GOTO <31..32..33.34..35,3b,3?.

UR^TE(5,255)

GO I 0 4b

WRITE (5- 260)

GOTO 45

UR^TE(5,.265)

GO I 0 4b

t.JPITE(5,2?e)

GOTO ^45 LJRITE(5,2?5)

GOTO 45

LiR ITE(5 .280)

GOTO 45

UR RE (5.. 285)

GOTO 45

UP I TE (5.. 290)

GOTO 45

39 UJR_I_TE(5,295)

GU!0 45

40 LJRITE(5,3e0)

45 CGHTIHUE

WRITERS, 305)

yR!TE(5, 150)

URITE (5,225) I yRI-E'5.23G)

30,39,40^ JARYtJJ

188
FORTRCIN IV D0b-01 SOURCE LISTING- PAGE 003

6068

0069

00?0

00? 1 00?2

00?3

00|-'4 150

200

00?6 2 0 'J 00?? 2 i '3 00 ?l.i 2 1 b

0 0 ? 9 220

0 0 y 0 003 1 230

u y ti

^ 2 J 'J

00S3 246

0064 245

0035 250

0086 255

008? 26?

0088 265

0089 2?0

0036 2r5

009 i 260

0092

0393

285

290

0094 2'='5 0095 300

0096 365

009?

13X, 1 10('-'

)

'HhRG3 = '

.. 12.) ENTER NUMBER

iJRITE':5,235:j

I I h i;5, 240)

CALL pycY';H,e,c, R.. 30 CONTINUE

GO TO i

1 1? 0 C »Ll. P VC V ( H , B , C , R .. CALL EXIT

C FORMAT STATEMENTS - FORMAT

FORMAT

FORMAT

FORMAT

FORMAT

FORMAT r

FORMAT' i

I

' SURNAME

FORMAT f, IH

1 IH , i3X.. 2 2X^ ! ' 23X

FuRr:AT( i H . 13X, '

! '

..

1 If! , 13X, ! , 15X, '! 2 ' 4 MILL ION'' .. 8X, '

!

'" FORMAT'.: IH , 13K, '

!

" FORMAT': 1H0 ' A (' . 12, '

1 3X. 'C( - , 12, ' ) =' ,E15

N, JARY)

B,NARGS, JhrY)

?X>

OF ARGUMENTS

IH ,

i H i

,

(

' 0

(12)

!•; ' EXITING QUERY' ) r ENTER QUERY FIELD IDENTIFIER')

13X. • r , leeX, '

! '.?K/1H ,13X,

. 43X,

DEUlLt ' , IX, 12,48,><,, '

! '

, 13X, '! , 108('-' ) ,

'

! '

! ' , 3X, 'ERROR RATE ' , 2X

ILE SIZE' ,3?X, '

!

, '! ', ibX, 'i ' i?X,

'^1

, 5X,

108 (

?X

1

dX, ' RhCALL ^ ACTOR'

,

, 10X,

220 MILLIUH'

E15.8,3X, 'B(

i;X, 'RC , 12, ' >

f4( ' -'

MILLION

bX. '

!

'XX

t

2 12, ) = ' .E15.8,3X, JARYC , 12.- ') = ', 12)

FORMAT a H 1 , 43X, ' RREC I S ION OF RETR lEVED

1 ,1-1 ELDS')

FORMATC IH FORMAT ( IH FORMAT'; IH FORMA^;^ IH

I- UK MA ! ( IH FORMATC IH FORMAT ( IH FORMAT'; iH

FORMATC IH FORMiATC IH FORMATC IH END

, 48 X.

, 46 X

, 48X.

, 48X. ,48X^

, 48 X.

, 48 X.

, 48X.

, 48X,

, 4SX.

, 48 X

12, '

) =' ,Ei5.8,

,E15.8,3X., 'SC

RESULTS FOR DATA

'DATE OF_BIRTH (MONTH AND DAY ONLY) ) 'MONTH OF BIRTH'

)

' YEAR OF B IRTH'

)

'STATE')

STREET NUMBER'

STREET NAME'

)

EDUCATION'

)

' COUNTY'

)

'DATE OF BIRTH

'AND SURNAME')

(YtHR, MOH'ri, AND DAY)'

189
STORAGE MRP

H

ElCR

SJARY

IFLD

HRGS

SURHM

HARGS

IJ

NPVCY

EXIT

606006

005062

6130212

I3002G6

9063.42

0005P0

600416

000472

002100

002102

602104

002 106

000000

000000

COMMGN BLOCK //

IRAN

JRAN

EARV

PAR't'

000000

000002

808004

000160

REAL*4

REAL.-K4

REAL*4

REAL.--h:4 REAL*4

1NTEGE:R'.k2 IHTEGER*2

REAL +4

REAL?K.4 IHTEGER't<2

INTEGER*2

Ih rEGER=i-2

il-iTEGER>i<2 REAL>f:4 RErtL*4

ARRAY

ARRAY

ARRAY

ARRAY

ARRAY

ARRAY

ARRAY

ARRAY

ARRAY

VARIABLE

VARIABLE

VARIABLE

VARIABLE

PROCEDURE

PROCEDURE

(11)

(11)

( 1 1) (11)

( 1 1 )

( 1 1

( 1 1

( 1 1 (10

LtNGTH 000174

IHTEGERf^S

IHTEGER*2

REhL:-k-4 REAL-+:4

VARIABLE

VARIABLE

ARRAY (27)

ARRAY (3)

190
FORTRAN r D06-01 SOURCE LISTING PhGE 001

Sua i

6002

f=)B03 0004

13065 0006

000?

0008

''1009 06 10 06 1 i 00 12 00 1 3 00 14

0015

00 15 0M t ? 0016

09 19

0020

003 i 0022

0623

602';! Q025

W L1 2 r3 '''32? 0029

0030

003 1 0032

9033

bU34

0035

PRIVACY .MCDEL--MARi::H 19?6

BEEN MODIFIED TO PRODUCE H

C.^'.>t'^+^?K^K>K'1<'^<.H:>^^^^?K^^<'t'**>^>^<>K?K C liHlTl COMPUTATION ROUTINE OF

C ^»<|--iOTe: THIS SUBROUTINE HAS

(J:1<j|<* KJi<>*<H<'lc-trH;>t;>h;<<->K>|<>K>t'5t< SubKUiJTIiiE PvT:y( A J . BJ, CJ, RJ, SJ, NARGS, JARY)

C ^~>KH^K*>l<^'>t•M<*.'t ?h-i<.'K-+;K*;(<>l<.+: C DECLARE VARIABLES

C;t^^^<;K-+-*H^5t^;^•>KH<:H"l*>^:l^>l<>K>^<>K>^< D IMEHS luhi jhRy( 1 i

)

DOUBLE PRECISION B COMMON

REAL A

TABULAR PRINTOUT.

:GPH 1 n .F.VARYn3,3J

I RAN , JRAH .. EAR Y( 27 ') , PARV ( 3

)

J i 1 1 ) , BJ < 1 1 .) , C J (

1 1) , RJ (11) , S J (in

KtP'. uARi'(ir)

DATA VARY ( 1 , 1 )

. ''9 . ODO--'

C MAIN LOOP STARTS HERE

CC VALUES ARE RETURNED IN THE ARGUMENT ARRAY:

IF (NARGS) 95.. 95^ 1 1

C BEGIN PROCESSING THE QUERY RESPONSE HERE

1 1 CONTINUE

DO 90 JK = 1,13

L=.TK CONF = 1

. -0 . 005* ( L- 1

R E F A C = C 0 N r ( N A R G S

)

ERRAT= 1

. -CONF

PERERR=ERRAT>t^i00

DO 80 I

=^ i , 3

P=PhRY( I) DO 20 II = i , HARGS

20 QARY ( I T ) =pJt<S J ( I I ) *CONF

C-^***^'**H^-'+^?^:^->t"t<?i<:^^'.io|'>t<>K C NO(..J COMPUTE THE FUNCTION F

F=l ., K = P.^f 1 . -P)

DO 30 J.J=1 -NARGS

B I GP I ( J J ) - ( 1 . - Q A R Y ( J J ) ) .^3A R Y ( J J

)

30 F«F*X*B IGPI ( JJ)

F=F..-<K

C PREPARE THE PFIHTOUT TA^LE

VARY ( Ji< .. I'l = 1 . .' ( 1 . +F

)

.GT

-TERMINATE IF NARGSIF(VARY(.JK, t; CONTINUE

LIRITE';5, 150)

CON I iNUE

1 ? 0

)

1.0) ) VARY(JK:, D-l .0

PERERR,REFAC, ^VARYcJK, V) , i

- 1,-1)

IJRITEC; RETURN

C E X I r V J A HERE UHEN W I- :R G S = 0

95 bJR I TE (5, 200)

RETURN

191
FGR"^RfiN IV 1)06-01 SOURCE L I STING PfiGE 002

C F 'MAT SThTEMEHT SECTION

r" ^^;^l'.-^<;^^,^:^•.;^^^Cilc.!^^{^f^;^K;|^?K^K^<^K>l< ei33G 156 FORMAT <1H , 13X, '

' \' , 17X, * ! ' , 23X- ' 1' , 2?X, ' f',22K,

1 IH .. 13X,. ' r ..4X,FS.2, ,4X,. '! ' ,4X,FS.4,5X, =

! %4X..

2 F i5. 8,4>^, 'i %6X.E15.8,6X, 'I ' , 3X.. E 15 . 3,4X, ' ! ' ,7X)

0037 170 PORMATCIH , i3X, ilQC "'),7X)

eB'^S Z-tm FOPhMTdHG,' HORMRL TERMIHRTIOH'

)

003:? EhiD

192
FORTRfl!^ IV STORflGE MhP

IHTEGFRf<2 PhRhMETER ARRAY (11)

B IGP I REi-lL--i;8 flRRHN' <11)

VhRy f?i!3C' 162 REHL''Cd ARRAY (13- 5,1 VElTOReI;

A,J REAL*4 PARAMETER ARRAY (11)

B.J 6660 lb REHL-i^4 PARAhETER ARRAY ( 1

1

)

CJ 666^26 REHL>h:4 PARAMETER ARRAY (11)

R J QQtiy22 REHL+-4 PHKHllETbR ARRAY (11)

G.T Pl;'6e24 RErtL*4 PARAMETER ARRAY ( 1 1

)

QhRV 01^0652 REhL*4 ARRA'r (11)

T L 1 "T* i~' f" lTMi .1^ —1 I!iTciiER*.2 PmPH'IETER VriR IhBLE

F 60 I i 46 REAL-N8 'v'AR I At'iLE P 06 1 i 50 R£hL>k4 VhR IhBLE

JK 00 1 154 1 N 1 Ebl.;R?)<2 vhR iHbLE

L 06 1 i5b INTEGER ••(^2 VARIABLE

CONF 661160 REhL^4 VARIAeLE

REFAC i^Sl 164 REAL>k4 VARIABLE

E^RRhT 061 i?6 REf-iLn<4 VARIAPi.,E /

r"i r~" r*-! r~ r~i i—i perekr 00 i 1 74 REhL>k4 VARIABLE

I 00 1 200 IHTEGERK2 VARIABLE

I I 06 1 202 IHTEGER'tsZ' VARIABLE

X 06 1264 rehlm VARIABLE

J J 001210 iNTEGERt<2 VARIABLE

CUfiMfiN tlL:Ji:K ..-v LENGTH 000174

trhh 000060 INTEGER'^2 VARIRPLE

jrhh 000662 IHTEGERi^2 VARIABLE

Ef'iRY Pian064 RE!^L*4 ARRAY (2?)

PfiRY 000 160 REi-iL>i':4 ARRAY (3)

193

II3S-114A (REV. 7-73)

U.S. DEPT. OF COMM. 1. PUBLICATION OR RKPORT NO. 2. Gov't Accession BIBLIOGRAPHIC DATA No. SHEET NBS SP-500-2

3. Recipient's Accession No.

TITLE AND SUBTITLE

1Arrpssino \ \^ \^ \^ ^ tj IIIVJ Individual XII \tl 1 V 1 u U \A I Records 1 ^ V« w W 1 VJ'-J From 1 1 will Personal I ^1 \J I M 1 Data Files Using Non-Unique Identifiers

5. Publication Date

jrcL/xu-dxy J-7< 1 6. Performing Organization Code

AUTHOR(s) Gwendolyn B. Moore, John L. Kuhns,

ileffrey L. Trefftzs, Christine. A. Montgorrery

8. Performing Organ. Report No.

1,

2

PERFORMING ORG AI^IZATIGN NAME ANfD ADDRESS

uperanng oystems, inc.

21031 Ventura Boulevard

Woodland Hills, California 91364

10. Project/Task/Work Unit No. 640.1118

11. Contract/Grant No. 5-35928

. Sponsoring Organization Name and Complete Address (Street, City, State, ZIP)

National Bureau of Standards

Department of Commerce

Washington, D.C. 20234

13. Type of Report & Period Covered Final 31 March 1976

14. Sponsoring Agency Code

5. SUPPLEMENTARY NOTES

' Library of Congress Catalog Card Number: 76-57950

!i6. ABSTRACT (A 200-word or less factual summary of most significant information. If document includes a significant

bibliography or literature survey, mention it here.)

I The Privacy Act of 1974 places restrictions on the Federal, state and local agencies'

i use of the Social Security account number as an identifier. For some agencies,

compliance will involve changes in implementation of retrieval algorithms. This

report describes methodology applicable to these changes in the more general context

\ of the problem of retrieving individual records from files using non-unique

\ identifiers. State-of-the-art retrieval techniques are discussed, a method for

' assigning reliability weights to various personal data elements is presented, file

j validation techniques for the error and omission rates of data items are suggested,

and a retrieval probability model--desi gned to show likelihood of retrieval of a

I subject's record given a variety of populations, combinations of identifiers, and

error/omission rates--is described. A methodology is developed for forming confidence factors from the established error/omission rates for combinations of nonunique identifiers that are candidates for use as retrieval keys. Use of these

I confidence factors as indices into the precision tables produced by the probability

I model is described.

7. KEY WORDS (six to twelve entries; alphabetical order; capitalize only the first letter of the first key word unless a proper name; separated by semicolons

)

Data retrieval; file validation; name lookup; non-unique identifiers; personal

data files; Privacy Act; probability model; retrieval.

8, AVAILABILITY [X] Unlimited

1 ! For Official Distribution. Do Not Release to NTIS

C^Order From Sup. of Doc, U.S. Government Pj-LntUiS\ftffife Washington, D.C. 20402. SD Cat. No. C13 • iU:5vU-Z

1 ! Order From National Technical Information Service (NTIS)

Springfield, Virginia 22151

19. SECURITY CLASS

(THIS REPORT)

UNCL ASSIFIED

21. NO. OF PAGES

2 03

20. SECURITY CLASS

(THIS PAGE)

UNCLASSIFIED

22. Price $2.65

USCOMM-DC 29042-P74

jU.S. GOVERNMENT PRINTING OFFICE: 1977 Z40-848/120 1-3
ANNOUNCEMENT OF NEW PUBLICATIONS ON

COMPUTER SCIENCE & TECHNOLOGY

Superintendent of Documents,

Government Printing Office,

Washington, D. C. 20402

Dear Sir:

Please add my name to the announcement list of new publications to be issued in the series: National Bureau of Standards Special Publication 500-.

Name

Company

Address

City State Zip Code

(Notification key N-503)
NATIONAL BUREAU OF STANDARDS

The National Bureau of Standards' was established by an act of Congress March 3, 1901. The Bureau's overall goal is to strengthen and advance the Nation's science and technology

and facilitate their effective application for public benefit. To this end, the Bureau conducts

research and provides: (1) a basis for the Nation's physical measurement system, (2) scientific and technological services for industry and government, (3) a technical basis for equity in trade, and (4) technical services to promote public safety. The Bureau consists of the Institute for Basic Standards, the Institute for Materials Research, the Institute for Applied Technology,

the Institute for Computer Sciences and Technology, and the Office for Information Programs.

THE INSTITUTE FOR BASIC STANDARDS provides the central basis within the United

States of a complete and consistent system of physical measurement; coordinates that system

with measurement systems of other nations; and furnishes essential services leading to accurate and uniform physical measurements throughout the Nation's scientific community, industry,

and commerce. The Institute consists of the Office of Measurement Services, the OfRce of Radiation Measurement and the following Center and divisions:

Applied Mathematics — Electricity — Mechanics — Heat — Optical Physics — Center

for Radiation Research: Nuclear Sciences; Applied Radiation — Laboratory Astrophysics

— Cryogenics " — Electromagnetics - — Time and Frequency

THE INSTITUTE FOR MATERIALS RESEARCH conducts materials research leading to improved methods of measurement, standards, and data on the properties of well-characterized

materials needed by industry, commerce, educational institutions, and Government; provides

advisory and research services to other Government agencies; and develops, produces, and

distributes standard reference materials. The Institute consists of the Office of Standard

Reference Materials, the Office of Air and Water Measurement, and the following divisions:

Analytical Chemistry — Polymers — Metallurgy — Inorganic Materials — Reactor

Radiation — Physical Chemistry.

THE INSTITUTE FOR APPLIED TECHNOLOGY provides technical services to promote

the use of available technology and to facilitate technological innovation in industry and Government; cooperates with public and private organizations leading to the development of technological standards (including mandatory safety standards), codes and methods of test; and provides technical advice and services to Government agencies upon request. The Insti- tute consists of the following divisions and Centers: Standards Application and Analysis — Electronic Technology — Center for Consumer

Product Technology: Product Systems Analysis; Product Engineering — Center for Building

Technology: Structures, Materials, and Life Safety; Building Environment; Technical Evaluation and Application — Center for Fire Research: Fire Science; Fire Safety Engineering.

THE INSTITUTE FOR COMPUTER SCIENCES AND TECHNOLOGY conducts research and provides technical services designed to aid Government agencies in improving cost effec- tiveness in the conduct of their programs through the selection, acquisition, and effective utilization of automatic data processing equipment; and serves as the principal focus within

the executive branch for the development of Federal standards for automatic data processing

equipment, techniques, and computer languages. The Institute consists of the following

divisions: Computer Services — Systems and Software — Computer Systems Engineering — Information Technology.

THE OFFICE FOR INFORMATION PROGRAMS promotes optimum dissemination and

accessibility of scientific information generated within NBS and other agencies of the Federal Government; promotes the development of the National Standard Reference Data System and

a system of information analysis centers dealing with the broader aspects of the National Measurement System; provides appropriate services to ensure that the NBS staff has optimum

accessibility to the scientific information of the world. The Office consists of the following

organizational units: Office of Standard Reference Data — Office of Information Activities — Office of Technical

Publications — Library — Office of International Relations — Office of International Standards.

' Headquarters and Laboratories at Gaithersburs;, Maryland, unless otherwise noted: mailing address Washington, D C. 20234.

- Located at Boulder. Colorado 80302.
U.S. DEPARTMENT OF COMMERCE

National Bureau of Standards

Washington. D.C. 20234

OFFICIAL BUSINESS

Penalty for Private Use, $300

POSTAGE AND FEES PAID

U.S. DEPARTMENT OF COMMERCE COM-215

SPECIAL FOURTH-CLASS RATE BOOK