Region
United States
48
Great Britain
35
European Economic Community countries
13
Europe
10
Japan
10
France
8
Germany (West)
5
India
3
Developing countries
2
East Asia
2
Korea (South)
2
Organisation for Economic Co-operation and Development countries
2
Poland
2
Soviet Union
2
Africa
1
Africa, Southern
1
Africa, Sub-Saharan
1
Austria
1
Canada
1
Communist countries
1
England
1
Europe, Eastern
1
Europe, Western
1
European Union countries
1
Germany
1
Germany (East)
1
Germany, East
1
Great Britian
1
Hungary
1
Israel
1
Mexico
1
Persian Gulf Region
1
Russia
1
Scotland
1
Sweden
1
Switzerland
1
Underdeveloped areas
1
Wales
1