Region
United States
6
United States --
4
Developing countries
2
Developing countries --
2
Europe
2
Former Soviet Republics
2
South Africa
2
Asia
1
Asia --
1
Asia, Southeastern
1
Europe --
1
Europe, Eastern
1
Former Soviet republics
1
Former Soviet republics --
1
Great Britain
1
Great Britain --
1
Hungary
1
Ireland
1
Korea
1
Latin America
1
Northern Ireland
1
South Africa --
1
Syria
1
Yugoslavia
1
Zaire
1
Zaire --
1