20172016201520142013
United States53.6%54.8%54.6%53.2%52.1%
Other Americas8.9%10.5%11.4%12.4%12.0%
Europe23.1%21.2%18.9%18.5%17.1%
Asia6.3%6.1%8.0%8.1%9.4%
Middle East8.1%7.4%7.1%7.8%7.3%
Other-0.0%-0.0%0.0%0.0%2.1%