Region
United States
United States --
China
4
China --
4
ASEAN countries
2
ASEAN countries --
2
Japan
2
Japan --
2
Soviet Union
2
Soviet Union --
2
Europe --
1
European Economic Community countries
1
European Economic Community countries --
1
India
1
India --
1
Latin America
1
Latin America --
1
Mexico
1
Mexico --
1