The exact detail is 9,267,503 Linkedin members (Source: Linkedin Ads, February 18, 2014).
And as press.linkedin.com writes the South East Asian area passed the 50 million members mile stone.
Europe has including CEE a good 70 million members, while the US is over 101 million members (Canada is has some 400 thousand more members on Linkedin then CEE). She is still the strongest nation. So North America has over 110 million members, which is though less the half of the total membership.
Latin America has 41 million members which is a little less then South East Asia, while Middle East has still only 9,684,742 (Canada has 9,687,276) members.