United States 353
China 82
Developing countries 75
Japan 60
Latin America 53
Great Britain 38
Europe, Eastern 34
Africa 31
Soviet Union 31
India 25
France 21
Germany 19
Brazil 15
Korea (South) 15
Africa, Sub-Saharan 13
Europe 13
Poland 13
Russia (Federation) 13
Mexico 12
Southeast Asia 12
Asia 11
Chile 11
Taiwan 11
East Asia 10
European Economic Community countries 9
Argentina 8
Germany (West) 8
European Union countries 7
Former Soviet republics 7
Peru 7
America 6
Hungary 6
Netherlands 6
Spain 6
Sweden 6
Caribbean Area 5
Communist countries 5
Hong Kong (China) 5
Indonesia 5
Pacific Area 5
Pakistan 5
Germany (East) 4
Middle East 4
Nigeria 4
Sri Lanka 4
Tanzania 4
Cuba 3
Czechoslovakia 3
Egypt 3
Israel 3
Kenya 3
North America 3
South Africa 3
Turkey 3
Uganda 3
Venezuela 3
Yugoslavia 3
Africa, Southern 2
Africa, West 2
Amazon River Region 2
Australia 2
Austria 2
Bolivia 2
Canada 2
Central America 2
Colombia 2
Czech Republic 2
Europe, Southern 2
Greece 2
Hong Kong 2
Ireland 2
Korea 2
Korea (North) 2
Malaysia 2
Nicaragua 2
Palestine 2
Saudi Arabia 2
Singapore 2
South America 2
Switzerland 2
Thailand 2
Vietnam 2
Zimbabwe 2
Africa, French-speaking West 1
Africa, North 1
Angola 1
Appalachian Region 1
Arab countries 1
Balkan Peninsula 1
Baltic States 1
Brazil, Northeast 1
Bulgaria 1
Colonies 1
Côte d'Ivoire 1
Côte d'Ivoire 1
Detroit 1
Detroit (Mich.) 1
Developed countries 1
England 1
Europe, Central 1