Region
United States --
106
United States
60
Soviet Union --
25
Europe --
18
Soviet Union
15
Great Britain --
14
United states --
14
Japan --
13
Asia, Southeastern --
12
Developing countries
11
Developing countries --
11
Germany --
10
Great Britain
10
Africa --
7
Korea (North) --
7
Asia --
6
China --
6
East Asia --
6
Europe
5
Former Soviet republics --
5
France
5
Germany
5
Korea (South) --
5
Russia
5
Russia (Federation) --
5
Asia
4
Former Soviet republics
4
France --
4
Korea (North)
4
Russia (Federation)
4
Yugoslavia --
4
China
3
Germany (West) --
3
India --
3
Japan
3
Middle East --
3
Pacific Area
3
Pacific Area --
3
Russia --
3
Taiwan
3
Taiwan --
3
Asia, Southeastern
2
Canada
2
Europe, Eastern --
2
Foreign countries
2
Germany (East) --
2
Germany (West)
2
India
2
Iraq
2
Iraq --
2
more ...