Region
China --
25
United States --
16
China
15
Europe, Eastern --
11
Japan --
10
United States
10
India --
8
Asia --
7
Europe, Eastern
7
Developing countries --
6
Japan
6
Korea (South) --
6
Malaysia
6
Malaysia --
6
Asia
4
Europe --
4
India
4
Russia (Federation) --
4
Soviet Union --
4
Vietnam --
4
Australia --
3
Great Britain --
3
Korea (South)
3
Latin America
3
Latin America --
3
Pacific Area
3
Pacific Area --
3
Vietnam
3
Africa --
2
Asia, Southeastern --
2
Australia
2
Burma --
2
Developing countries
2
East Asia --
2
European Economic Community countries --
2
Former Soviet republics --
2
France --
2
Great Britain
2
Indonesia --
2
Poland --
2
Russia (Federation)
2
Singapore --
2
Soviet Union
2
Taiwan --
2
Thailand --
2
ASEAN countries
1
ASEAN countries --
1
Africa
1
Arab countries --
1
Argentina
1
more ...