Region
United States
4
Belize
2
Brazil
2
Canada
2
Caribbean Area
2
Côte d'Ivoire
2
East Asia
2
Latin America
2
Namibia
2
Sri Lanka
2
Vietnam
2
Antigua and Barbuda
1
Argentina
1
Australia
1
Bangladesh
1
Barbados
1
Belgium
1
Bermuda Islands
1
Bolivia
1
Burma
1
Cambodia
1
Chile
1
China
1
Colombia
1
Congo (Democratic Republic)
1
Costa Rica
1
Croatia
1
Czechoslovakia
1
Denmark
1
Developing countries
1
Dominican Republic
1
Ecuador
1
Egypt
1
El Salvador
1
Europe, Eastern
1
European Union countries
1
Finland
1
France
1
Germany
1
Ghana
1
Great Britain
1
Greece
1
Grenada
1
Guatemala
1
Guyana
1
Haiti
1
Honduras
1
Hungary
1
Iceland
1
India
1
more ...