Region
Soviet Union --
532
Soviet Union
343
United States
100
United States --
97
China
28
China --
28
Russia (Federation) --
25
Europe, Eastern --
24
Europe, Eastern
21
Asia
18
Russia --
18
Asia --
16
Russia (Federation)
14
Developing countries
13
Europe
13
Europe --
13
Middle East
10
Russia
10
India
9
India --
9
Middle East --
9
Japan --
8
Pacific Area
8
Developing countries --
7
Former Soviet republics --
7
Japan
7
Pacific Area --
7
Asia, Southeastern
6
Asia, Southeastern --
6
Great Britain
6
Afghanistan --
5
East Asia
5
East Asia --
5
Malaysia
5
Yugoslavia --
5
Germany --
4
Great Britain --
4
Soviet Union - --
4
Vietnam --
4
Asia, Central --
3
Germany
3
Israel
3
Israel --
3
Malaysia --
3
Pakistan
3
Pakistan --
3
South Asia
3
Syria
3
Syria --
3
United states --
3
more ...