Region
United States --
22
United States
18
Soviet Union --
9
Soviet Union
7
United states --
5
Great Britain
4
Great Britain --
4
Developing countries
3
Afghanistan
2
Afghanistan --
2
Asia, Southeastern
2
Developing countries --
2
Europe
2
Middle East
2
Middle East --
2
Africa, Northeast
1
Africa, Northeast --
1
Asia, Southeastern --
1
Developing countries - --
1
Egypt
1
Egypt --
1
Ethiopia
1
Ethiopia --
1
Europe --
1
Germany
1
Germany --
1
Horn of Africa
1
Horn of Africa --
1
India
1
India --
1
Latin America --
1
Pakistan
1
Pakistan --
1
Russia (Federation) --
1
Somalia
1
Somalia --
1
South Africa
1
South Africa --
1
South Asia --
1
Spain --
1
Turkey
1
Turkey --
1
United States - --
1