20162015201420132012
North America68.6%64.9%64.0%68.5%69.8%
United Kingdrom8.7%10.7%10.6%10.0%11.1%
Continental Europe18.1%19.7%20.2%17.4%14.7%
Other Region4.7%4.7%5.2%4.1%4.4%