Region
United States --
United States
15
China
3
China --
2
Europe --
2
European Economic Community countries --
2
Japan --
2
Latin America
2
Latin America --
2
Australia
1
Australia --
1
East Asia --
1
Europe
1
Europe, Eastern
1
Europe, Eastern --
1
European Economic Community countries
1
Japan
1
Pacific Area --
1
Soviet Union --
1