Region
Europe, Eastern --
23
Europe, Eastern
18
Soviet Union
8
Soviet Union --
8
United States
5
United States --
5
Russia (Federation) --
4
Former Soviet republics --
3
Eastern Europe
2
Former Soviet republics
2
Germany (West)
2
Germany (West) --
2
Russia (Federation)
2
Developing countries
1
Developing countries --
1
Europe --
1
European Union Countries
1
European Union Countries --
1
Korea (North)
1
Korea (North) --
1
Latin America
1
Latin America --
1