<TABLE> <S> <C>


<ARTICLE>                     5
<LEGEND>
THIS  SCHEDULE  CONTAINS  SUMMARY  FINANCIAL   INFORMATION  EXTRACTED  FROM  THE
CONSOLIDATED  BALANCE SHEETS AS OF MARCH 31, 1996,  JUNE 30, 1996, AND SEPTEMBER
30, 1996 AND THE RELATED  CONSOLIDATED  STATEMENTS OF INCOME AND IS QUALIFIED IN
ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS. THE INFORMATION PROVIDED
FOR THE THREE MONTHS  ENDED MARCH 31,  1996,  THE SIX MONTHS ENDED JUNE 30, 1996
AND THE NINE  MONTHS  ENDED  SEPTEMBER  30, 1996 HAS BEEN  RESTATED  PURSUANT TO
STATEMENT OF FINANCIAL  ACCOUNTING  STANDARDS NO. 128, EARNINGS PER SHARE ("SFAS
N0. 128").  IN ADDITION,  CERTAIN  ENTRIES ON THESE  SCHEDULES HAVE BEEN AMENDED
FROM THE  PREVIOUS  FINANCIAL  DATA  SCHEDULES  FILED  FOR THESE  PERIODS.  THIS
SCHEDULE IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
THIS  EXHIBIT  SHALL NOT BE DEEMED  FILED FOR THE  PURPOSE  OF SECTION 11 OF THE
SECURITIES ACT OF 1933 AND SECTION 18 OF THE SECURITIES EXCHANGE ACT OF 1934, OR
OTHERWISE  SUBJECT TO THE LIABILITY OF SUCH  SECTIONS,  NOR SHALL IT BE DEEMED A
PART OF ANY OTHER FILING WHICH  INCORPORATES  THIS REPORT BY  REFERENCE,  UNLESS
SUCH OTHER FILING EXPRESSLY INCORPORATES THIS EXHIBIT BY REFERENCE.
</LEGEND>
<RESTATED>
<MULTIPLIER>                  1,000
<CURRENCY>                    U.S. Dollars
       
<S>                               <C>                        <C>                       <C>
<PERIOD-TYPE>                       3-MOS                      6-MOS                     9-MOS
<FISCAL-YEAR-END>               DEC-31-1996                DEC-31-1996               DEC-31-1996
<PERIOD-START>                  JAN-01-1996                JAN-01-1996               JAN-01-1996
<PERIOD-END>                    MAR-31-1996                JUN-30-1996               SEP-30-1996
<EXCHANGE-RATE>                           1                          1                         1
<CASH>                                1,758                     69,078                    15,189
<SECURITIES>                              0                          0                         0
<RECEIVABLES>                        13,252                     11,975                    25,870
<ALLOWANCES>                          2,300                      2,200                     2,300
<INVENTORY>                               0                          0                         0
<CURRENT-ASSETS>                          0                          0                         0
<PP&E>                              816,381                    815,592                   858,040
<DEPRECIATION>                      176,344                    175,467                   176,785
<TOTAL-ASSETS>                      887,164                    825,604                   865,153
<CURRENT-LIABILITIES>                     0                          0                         0
<BONDS>                             361,926                    296,503                   330,580
<PREFERRED-MANDATORY>                     0                          0                         0
<PREFERRED>                               0                          0                         0
<COMMON>                                404                        404                       405
<OTHER-SE>                          490,134                    495,048                   494,810
<TOTAL-LIABILITY-AND-EQUITY>        887,164                    825,604                   865,153
<SALES>                                   0                          0                         0
<TOTAL-REVENUES>                     29,667                     60,875                    89,936
<CGS>                                     0                          0                         0
<TOTAL-COSTS>                           550                      1,219                     1,646
<OTHER-EXPENSES>                          0                          0                         0
<LOSS-PROVISION>                          0                          0                         0
<INTEREST-EXPENSE>                    6,752                     13,970                    19,929
<INCOME-PRETAX>                      13,777                     35,671                    51,502
<INCOME-TAX>                              0                          0                         0
<INCOME-CONTINUING>                  13,777                     35,671                    51,502
<DISCONTINUED>                            0                          0                         0
<EXTRAORDINARY>                           0                          0                         0
<CHANGES>                                 0                          0                         0
<NET-INCOME>                         13,777                     35,671                    51,502
<EPS-PRIMARY>                           .34                        .88                      1.28
<EPS-DILUTED>                           .34                        .88                      1.27
                                  


</TABLE>