Where did you get that from?
I clicked through the links on that page and the most recent month had this:
Re:37signals to Drop IE6 Support
by Xichekolas on Thursday July 03, 2008 @02:46PM
(#235483)
What is really amusing about those stats is the 77 visitors still using IE 3. I don't even have a 12 year old computer that still functions, let alone a 12 year old browser.
No, 77 is the age of the IE3 users.
FWIW, the first one I clicked on was this:
http://www.w3counter.com/globalstats.php?date=2008-05-31
Not that it's the best source of data, but.
[1] http://en.wikipedia.org/wiki/Usage_share_of_web_browsers