How much do you use the internet each month?

Nielsen sent me a newsletter this morning that quoted statistics for internet usage statistics per person (January 2008):

- 61 internet sessions per month
- 109 different websites visited per month
- 2,492 web pages visited per month
- 70 hours of pc-time per month

These numbers are all up 7 - 12% from this time last year. Session numbers are obviously questionable, since what exactly warrants a session, but the number of web-pages surprises me in terms of per-person average - it seems like people consume a lot of pages across not all that many sites. Meanwhile if I plotted my "pc-time per month" it would probably be pretty embarrassing compared to the average.