There have always been Arsenal supporters outside London, and since the advent of satellite television, a supporter's attachment to a football club has become less dependent on geography. Consequently, Arsenal have a significant number of fans from beyond London and all over the world; in 2007, 24 UK, 37 Irish and 49 other overseas supporters clubs were affiliated with the club. A 2011 report by SPORT+MARKT estimated Arsenal's global fanbase at 113 million. The club's social media activity was the fifth highest in world football during the 2014–15 season.
How many supporter clubs outside Britain  were there in 2007 affiliated with Arsenal?
49