المنطقة
United States
129
États-Unis
23
Great Britain
5
India
5
Canada
3
Africa
2
California
2
China
2
Developing countries
2
Estados Unidos
2
Latin America
2
Southern States
2
Soviet Union
2
USA
2
Africa, West
1
Arab countries
1
Australia
1
Europe
1
France
1
Grande-Bretagne
1
Islamic countries
1
Japan
1
Kenya
1
Korea
1
Nigeria
1
Poland
1
Russia
1
Taiwan
1
Tropics
1
UNITED STATES
1