Region
United States
63
Soviet Union
17
China
14
Europe
13
Developing countries
12
Europe, Eastern
12
Latin America
10
Africa
8
Central America
8
Germany
8
Japan
7
Germany (West)
6
Former Soviet republics
5
Middle East
5
Austria
4
Germany (East)
4
Poland
4
Russia (Federation)
4
France
3
Great Britain
3
India
3
Mexico
3
Vietnam
3
Yugoslavia
3
Africa, Sub-Saharan
2
Argentina
2
Asia
2
Burma
2
Caribbean Area
2
Central Europe
2
Chile
2
Communist countries
2
Cuba
2
East Asia
2
El Salvador
2
Europe, Central
2
European Union countries
2
Iran
2
Near East
2
Northern Ireland
2
South Africa
2
Spain
2
Switzerland
2
Taiwan
2
Tropics
2
Arab countries
1
Asia, Southeastern
1
Belfast
1
Berlin (Germany)
1
California
1
more ...