Region
United States
United States --
239
Japan
28
Japan --
23
Soviet Union
22
Soviet Union --
19
China --
12
Europe
11
China
10
Developing countries
9
Europe --
9
Asia
8
Asia --
8
Great Britain
8
Korea (South) --
7
United states --
7
Korea (South)
6
Latin America
6
Central America
5
Central America --
5
East Asia --
5
Israel
5
Israel --
5
Latin America --
5
United States - --
5
Developing countries --
4
East Asia
4
Great Britain --
4
Mexico --
4
Russia (Federation)
4
Russia (Federation) --
4
Russia --
4
Canada
3
Cuba
3
Cuba --
3
European Economic Community countries
3
European Economic Community countries --
3
European Union countries
3
Germany
3
Mexico
3
Russia
3
South Africa
3
South Africa --
3
Afghanistan --
2
America --
2
Australia
2
Australia --
2
Canada --
2
Caribbean Area --
2
Chile
2
more ...