Region
United States
13
United States --
9
Developing countries --
8
Developing countries
6
Europe
6
Europe --
6
China
5
India
5
China --
4
Israel --
4
Japan
4
East Asia
3
East Asia --
3
Europe, Eastern --
3
Indonesia
3
Indonesia --
3
Japan --
3
Latin America
3
Taiwan
3
Arab countries
2
Arab countries --
2
Asia, Southeastern
2
Asia, Southeastern --
2
Europe, Eastern
2
Germany (West)
2
India --
2
Israel
2
Latin America --
2
Peru --
2
South Asia
2
Soviet Union --
2
Thailand
2
Africa
1
Africa --
1
Argentina --
1
Asia
1
Asia --
1
Belize
1
Belize --
1
Caribbean Area
1
Carribbean area
1
Central America
1
Central America --
1
Europe, Southern --
1
European Federation
1
European Union Countries --
1
Former Soviet republics
1
Former Soviet republics --
1
France
1
Great Britain
1
more ...