Region
Japan --
Japan
17
United States
8
United States --
8
Africa
2
East Asia --
2
Pacific Area
2
Pacific Area --
2
Africa --
1
Asia
1
Asia --
1
Asia, Southeastern
1
Asia, Southeastern --
1
China
1
China --
1
Developing countries
1
East Asia
1
Europe
1
Europe --
1
European Economic
1
European Economic Community countries
1
European Economic Community countries --
1
Great Britain
1
Great Britain --
1
Malaysia
1
Malaysia --
1
Nigeria
1
Russia
1
South Africa
1
Soviet Union
1
Tanzania
1