Wikipedia in numbers

15/11/01 Wikipedia was launched

1,000 articles posted in first month

17m articles posted in first ten years

1bn number of edits made to articles to date

50% proportion of site's traffic that comes from Google

270 number of languages articles are written in

10m money raised in donations by site's users last year

42% proportion of American adults who use the site when searching for information

400m number of people who use site every month