Region
Africa, North
1
Africa, Southern
1
Asia
2
Bolivia
1
Brazil
2
Canada
1
Caribbean Area
2
Central America
2
Chile
2
China
4
Communist countries
1
Comunidad de Estados Independientes
1
Cuba
6
Cyprus
1
Developing countries
4
Europa Oriental
1
Europe
4
Europe, Eastern
13
Europe, Western
1
France
2
Great Britain
1
Grenada
1
Hungary
5
Illinois
1
Indonesia
1
Iran
2
Islamic countries
1
Israel
1
Japan
12
Kentucky
2
Latin America
5
Libya
1
Louisville
2
Middle East
3
Missouri
2
Nicaragua
2
Paraguay
1
Philippines
1
Poland
1
Russia
1
Ryukyu Islands
1
South Africa
1
Soviet Union
19
Spain
1
United States
159
Vietnam
8
Washington (D.C.)
1
Zimbabwe
1