Region
United States
7
United States --
7
China
4
Asia
2
Asia --
2
China --
2
Latin America
2
Latin America --
2
North America
2
Pacific Area
2
Pacific Area --
2
Canada. Treaties, etc. 1992, Oct.7 --
1
Developing countries
1
East Asia --
1
Europe
1
Europe --
1
Europe, Eastern
1
France
1
Hungary
1
Hungary --
1
Japan
1
Japan --
1
North America --
1
Philippines
1
Philippinese --
1
Poland
1
Poland --
1
Soviet Union
1
Soviet Union --
1
Taiwan --
1