Region
China
10
Europe
10
United States
7
European Union countries
5
India
4
Great Britain
2
Iran
2
Africa, Southern
1
Belgium
1
Brussels
1
Europe, Eastern
1
European Economic Community countries
1
France
1
Germany
1
Germany (East)
1
Italy
1
Malaysia
1
Nigeria
1
Planning
1
Russia (Federation)
1
Singapore
1
Southeast Asia
1
Soviet Union
1
Turkey
1