Region
United States
6
Developing countries --
3
European Economic Community countries
2
United States --
2
Africa, Sub-Saharan
1
Africa, Sub-Saharan --
1
Communist countries --
1
Europe
1
Europe --
1
Europe, Eastern --
1
European Union Countries
1
European Union countries
1
Germany
1
Hungary
1
Islamic countries
1
Japan --
1
Latin America
1
Latin America --
1
Malaysia
1
Middle East --
1
Poland
1
Russia (federation)
1
South Africa
1
Spain
1
Spain --
1
Sweden
1