Region
Great Britain
17
Germany
10
United States
6
European Union countries
5
Europe
4
Europe, Eastern
3
European Economic Community countries
2
Japan
2
Soviet Union
2
Sweden
2
Belgium
1
China
1
Czechoslovakia
1
France
1
Germany (Wes)
1
Germany (West)
1
Great britain
1
Gret Britain
1
Hungary
1
Netherlands
1
OECD countries
1
Panama
1
Poland
1
Russia
1
Somalia
1
Spain
1