Region
Great Britain
43
United States
16
Europe
14
Developing countries
12
England
7
European Economic Community countries
6
Soviet Union
6
France
5
Communist countries
3
Europe, Eastern
3
Ireland
2
Japan
2
Afghanistan
1
Africa, Sub-Saharan
1
Finland
1
Germany
1
Latin America
1
Russia
1
Underdeveloped areas
1