Region
United States
20
Europe
12
Great Britain
6
Soviet Union
4
Germany
3
Germany (West)
3
Japan
3
China
2
Europe, Eastern
2
Russia (Federation)
2
Afghanistan
1
Africa
1
Africa, Southern
1
Asia
1
Australia
1
Caribbean Area
1
Developing countries
1
Florida
1
Former Soviet republics
1
Former communist countries
1
France
1
Hungary
1
Iraq
1
Israel
1
Lebanon
1
Manchuria
1
Manchuria (China)
1
South Africa
1
Spain
1