The document provides social media statistics from 2009-2012 for Facebook, Twitter, and YouTube. Some key highlights include: - By 2012, Facebook had over 1 billion active users globally with the majority (over 70%) located outside the US. Mobile users accounted for over 250 million people or 40% of Facebook's traffic. - Twitter saw over 500 million accounts in 2012 with 175 million tweets sent on busy days. The US had the most Twitter users but the Netherlands was the most active country. - YouTube was the third most visited website after Google and Facebook, accounting for 10% of total internet traffic. The US had the largest YouTube audience at 22% while India had the third largest at 4.8