20152014201320122011
North America64.9%64.0%68.5%69.8%69.1%
United Kingdrom10.7%10.6%10.0%11.1%12.4%
Continental Europe19.7%20.2%17.4%14.7%13.5%
Other Region4.7%5.2%4.1%4.4%5.0%