Region
Europe, Eastern
2
Former Soviet republics
2
Africa, French-speaking Equatorial
1
Africa, French-speaking West
1
Albania
1
China
1
Developing countries
1
European Economic Community countries
1
Germany (East)
1
Germany (West)
1
Hong Kong (China)
1
Japan
1
Korea
1
Mexico
1
Russia (Federation)
1
Thailand
1