Region
United States --
262
United States
203
China
20
China --
18
Asia
10
Asia --
10
Soviet Union --
8
Asia, Southeastern --
7
Japan
7
Japan --
7
Latin America --
7
Soviet Union
7
Asia, Southeastern
6
Great Britain --
6
Korea (North)
6
India
5
India --
5
Latin America
5
Developing countries --
4
Africa
3
Australia
3
Cuba
3
Cuba --
3
Europe
3
Europe --
3
Great Britain
3
Israel
3
Korea (North) --
3
Middle East
3
Middle East --
3
Philippines
3
United State --
3
Vietnam
3
Africa --
2
Arab countries
2
Arab countries --
2
Australia --
2
Caribbean Area
2
Central America --
2
Developing countries
2
East Asia
2
East Asia --
2
Europe, Eastern
2
Europe, Eastern --
2
France
2
Israel --
2
Malacca (State) --
2
Malaysia
2
Near East
2
Near East --
2
more ...