Table HC7-2a. Home Office Equipment by Year of Construction, 

 Million U.S. Households, 2001

Home Office Equipment

RSE Column Factor:

Total

Year of Construction

RSE

Row

Factors

1990

 to

20011

1980

to

1989

1970

to

1979

1960

to

1969

1950

to

1959

1949

or

Before

0.4 1.4 1.1 1.1 1.2 1.2 1.0

Total ............................................... 107.0 15.5 18.2 18.8 13.8 14.2 26.6 4.2

Households Using 

Office Equipment .......................... 96.2 14.9 16.7 17.0 12.2 13.0 22.4 4.4

Personal Computers2 ................... 60.0 11.0 11.6 10.3 7.2 7.8 12.0 5.3

 Number of Desktop PCs

 1 .................................................. 45.1 8.0 9.0 7.7 5.3 6.1 9.1 5.8

 2 or more .................................... 9.1 1.8 1.6 2.0 1.1 1.0 1.6 11.8

 Number of Laptop PCs

 1 .................................................. 12.0 2.8 2.3 1.8 1.5 1.4 2.2 11.0

 2 or more .................................... 2.2 0.9 0.5 Q Q Q 0.4 23.9

 Have Access to Internet ............. 50.7 9.3 10.1 8.8 6.1 6.7 9.7 5.7

 Hours PCs Turned

 On Each Week 

 Less than 2 hours ....................... 10.3 1.8 1.8 2.1 1.2 1.5 1.9 12.0

 2 to 15 hours ............................... 26.3 4.6 5.1 4.4 3.3 3.4 5.5 7.5

 16 to 40 hours ............................. 12.2 2.7 2.7 1.6 1.5 1.5 2.3 11.0

 More than 40 hours ..................... 5.7 0.8 1.1 1.2 0.7 0.8 1.1 15.4

 On All the time ............................ 5.6 1.1 0.9 1.0 0.6 0.6 1.3 16.3

 How PC is Used

 15 hours a Week or Less ............ 36.6 6.4 6.9 6.5 4.5 4.9 7.4 6.6

 16 hours a Week or More ........... 23.4 4.7 4.7 3.8 2.7 2.9 4.6 7.7

 Personal Use Only .................... 14.0 2.5 2.7 2.4 1.7 2.0 2.7 9.7

 Business Use Only ................... 2.1 0.5 0.4 0.3 0.3 0.2 0.4 23.6

 Both Personal and Business ..... 7.3 1.6 1.7 1.1 0.7 0.7 1.5 14.0

 Business Use of PC

 Other Business Use .................... 5.8 1.2 1.3 0.9 0.6 0.7 1.2 15.0

 Used for Telecommuting ............. 3.6 0.9 0.8 0.5 0.4 0.2 0.7 22.1

 1 to 4 Days per Week ............... 2.0 0.6 0.3 0.3 0.3 Q 0.4 27.0

 5 to 7 Days per Week ............... 1.6 0.4 0.4 Q Q Q 0.4 28.5

 Printer

 Attached to PC ............................ 52.8 10.0 10.4 9.1 6.3 6.7 10.3 5.7

 With Built-in Fax/Copier .............. 12.6 2.6 2.1 2.1 1.6 1.7 2.5 11.0

 Without Built-in Fax/Copier ......... 40.2 7.4 8.3 7.0 4.7 5.0 7.8 6.2

Other Office Equipment

 Cell/Mobile Telephone .................. 56.8 10.5 10.7 9.7 7.0 7.5 11.3 5.1

 Cordless Telephone ...................... 81.5 13.4 14.8 13.8 10.2 10.9 18.4 4.8

 Separate Facsimile Machine ........ 11.0 2.2 2.3 2.0 1.5 1.1 2.0 11.0

 Separate Photocopier ................... 7.4 1.2 1.4 1.2 0.9 0.9 1.7 13.4

 Telephone Answering Machine .... 65.7 10.5 11.8 11.2 8.5 8.7 15.0 4.9

1 New construction for 2001 includes only those housing units built and occupied between January and the April-August period when the household interviews were

conducted. 2 These numbers could include a combination of Desktop and Laptop personal computers.

Q = Data withheld either because the Relative Standard Error (RSE) was greater than 50 percent or fewer than 10 households were sampled.

Notes: • To obtain the RSE percentage for any table cell, multiply the corresponding column and row factors. • Because of rounding, data may not sum to totals. • See

"Glossary" for definition of terms used in this report.

Source: Energy Information Administration, Office of Energy Markets and End Use, Forms EIA-457 A, B, C of the 2001 Residential Energy Consumption Survey.

Energy Information Administration

2001 Residential Energy Consumption Survey: Housing Characteristics Tables