Region
United States --
158
United States
85
United states --
27
Developing countries
9
China --
8
Developing countries --
8
Soviet Union --
8
Soviet Union
5
Great Britain --
4
Middle East
4
Caribbean Area --
3
China
3
Great Britain
3
India
3
India --
3
Japan
3
Japan --
3
Middle East --
3
South Asia
3
South Asia --
3
Turkey
3
Turkey --
3
United State --
3
United States --
3
United States - --
3
Afghanistan
2
Afghanistan --
2
Africa
2
Africa --
2
Asia
2
Asia --
2
Caribbean Area
2
Europe
2
Europe --
2
Europe, Eastern
2
Europe, Eastern --
2
Foreign countries
2
Korea (South)
2
Latin America
2
Latin America --
2
United States. Congress. Senate - --
2
Africa, Northeast
1
Africa, Northeast --
1
Africa, Southern --
1
Cambodia --
1
Central America
1
Central America --
1
East Asia
1
East Asia --
1
Eastern Europe
1
more ...