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