"However the English-language version of the site suffered a net loss of 49,000 volunteer 'editors' in the first three months of this year, compared with 4,900 for the same period a year earlier, according to a university study."

Read more: http://www.dailymail.co.uk/sciencetech/article-1230790/Fears-future-Wikipedia-49-000-volunteers-leave-site.html#ixzz0XtwUmbO1

As Wikipedia becomes more complete, it needs fewer editors. Fifty thousand editors ought to be enough for any website.