Region
Developing countries --
5
United States --
5
European Economic Community countries --
4
Japan --
4
Malaysia
4
Malaysia --
4
Asia --
3
Asia
2
China
2
China --
2
East Asia --
2
United States
2
Africa
1
Africa --
1
Asia, Southeastern
1
Asia, Southeastern --
1
Australia --
1
Canada --
1
Eastern Europe --
1
Europe --
1
Europe, Eastern --
1
Germany (West) --
1
Germany --
1
Group of Twenty countries --
1
Japan
1