Region
Soviet Union
Soviet Union --
119
United States --
42
United States
39
China
22
China --
20
Asia
8
Asia --
8
Developing countries
7
Europe --
6
Europe, Eastern
6
Europe, Eastern --
6
Asia, Southeastern
5
Asia, Southeastern --
5
Europe
5
India
5
India --
5
Middle East
5
Middle East --
5
Developing countries --
4
Japan
4
Japan --
4
Great Britain
3
Great Britain --
3
Pacific Area
3
Pacific Area --
3
Syria
3
Syria --
3
Yugoslavia
3
Yugoslavia --
3
Afghanistan --
2
Africa
2
Africa --
2
East Asia
2
East Asia --
2
Israel
2
Israel --
2
Russia (Federation)
2
Russia (Federation) --
2
Singapore
2
Singapore --
2
South Asia
2
South Asia --
2
Afghanistan
1
Africa, Northeast
1
Africa, Northeast --
1
Asia, Central
1
Asia, Central --
1
Austria --
1
Baltic States
1
more ...