Region
21st century
1
Africa
1
Africa --
1
Asia
1
Asia --
1
Asia, Southeastern
1
Asia, Southeastern --
1
Britain
1
China
2
China --
2
Developing countries
4
Developing countries --
9
East Asia
2
East Asia --
1
Eastern Europe --
1
Europe
1
Europe --
4
European Economic Community countries --
4
Former Soviet republics --
1
Great Britain
1
Great Britain --
1
India --
1
Iraq --
1
Japan
2
Japan - --
1
Japan --
5
Korea --
1
Malaya --
1
Malaysia
5
Malaysia --
2
OECD countries --
1
Soviet Union
1
United Kingdom
1
United States
6
United States - --
1
United States --
12
United states --
1