Region
Soviet Union --
Soviet Union
22
United States --
8
United States
7
Russia --
5
Afghanistan --
2
Asia
2
Asia --
2
Developing countries
2
Developing countries --
2
Europe, Eastern
2
Europe, Eastern --
2
Afghanistan
1
Angola
1
Angola --
1
Asia - --
1
Eastern Europe
1
Europe --
1
Former Soviet republics
1
Former Soviet republics --
1
Germany
1
Germany --
1
Great Britain
1
Korea
1
Korea --
1
Russia
1
Russia (Federation) --
1
Yemen (People's Democratic Republic)
1
Yemen (People's Democratic Republic) --
1