Oblast
Africa
2
Africa, North
1
Africa, West
1
Argentina
1
Asia
2
Austria
1
Balkan Peninsula
1
Brazil
2
Bulgaria
1
Chile
1
China
12
Communist countries
1
Developing countries
25
East Asia
6
Ecuador
1
Europe
3
Europe, Central
1
Europe, Eastern
5
European Union countries
6
Former Soviet republics
2
Former communist countries
1
France
1
Germany
3
Germany (West)
1
Great Britain
1
Hungary
1
India
2
Japan
3
Jordan
1
Korea (North)
1
Korea (South)
2
Kosovo (Republic)
1
Latin America
6
Mexico
3
Middle East
1
Russia (Federation)
2
Slovakia
1
South Africa
1
South Asia
1
Soviet Union
2
Switzerland
1
Turkey
1
United States
9
Yugoslavia
1