Region
China --
8
Japan --
5
Europe, Eastern --
4
Korea (South) --
4
Russia (Federation) --
4
Former Soviet republics --
3
Soviet Union --
3
United States --
3
Asia --
2
Asia, Southeastern --
2
Europe --
2
Korea (South)
2
United States
2
Vietnam --
2
Africa
1
Africa --
1
Armenia (Republic) --
1
Asia
1
Bulgaria
1
Bulgaria --
1
Chile --
1
China
1
Communist countries --
1
Developing countries --
1
East Asia - --
1
East Asia --
1
Ecuador --
1
Estonia
1
Europe, Eastern
1
European Economic Community countries
1
European Economic Community countries --
1
European, Eastern --
1
Germany --
1
Greece --
1
Guyana --
1
Korea (North)
1
Korea (North) --
1
Laos --
1
Latin America --
1
Latvia
1
Latvia --
1
Lithuania
1
Lithuania --
1
Malaysia
1
Malaysia --
1
Mongolia --
1
Myanmar --
1
Poland --
1
Vietnam
1