Doing some googling to try and find some statistics on this topic.
My first find compares computer usage in the US between 1995 and 1999 (so it is fairly old):
At home:
In 1999, 54 percent had at least one computer in their homes compared to just 8% in 1983.
46 percent had connection to the Internet in their home computers compared to 21 percent in 1995.
45 percent had CD-ROM readers compared to 14 percent in 1995.
32 percent subscribed to an on-line service and had home e-mail addresses compared to 18 percent in 1997
17 percent had more than one computer in their homes compared to 12 percent in 1997.
Among all home computer users, the amount of time spent on the Internet increased more than tenfold between 1995 and 1999 (from 15 hours per year to approximately 160). In addition, for those with Internet access, the amount of time spent on Internet activities, including using e-mail and visiting Web sites, increased from an average of 80 hours in 1995 to 269 hours in 1999.
At work:
In 1983, one-fourth reported using a computer at work, and about one-third said they did in 1990. The proportion was up to 42 percent in 1999.
Twenty percent of those surveyed had e-mail addresses at work, up from 16 percent two years earlier.
The average amount of time spent using a computer at work increased 17 percent between 1995 and 1999, to about 950 hours per year.
I wonder what those figure are like for 2006!
Source:
Indicators 2000