Region
China
2
China --
2
Communist countries --
2
Europe, Eastern
2
Europe, Eastern --
2
Former Soviet republics --
2
Asia, Southeastern
1
Asia, Southeastern --
1
Czechoslovakia
1
Czechoslovakia --
1
Estonia
1
Japan
1
Japan --
1
Latin America
1
Latin America --
1
Lithuania
1
Lithuania --
1
Poland
1
Poland --
1
United States
1
United States --
1