Región
United States
9
Great Britain
8
China
4
Europe
3
Australia
2
Europe, Eastern
2
Japan
2
Pakistan
2
Africa
1
Asia
1
Cameroon
1
Foreign countries
1
Former Soviet republics
1
Hong Kong
1
India
1
Islamic countries
1
Korea (South)
1
Latin America
1
OECD countries
1
Pacific Area
1
Russia (Federation)
1
Taiwan
1
United Arab Emirates
1