Region
United States
11
United States --
11
Soviet Union
4
Soviet Union --
4
United states --
4
Afghanistan
1
Afghanistan --
1
Africa, Northeast
1
Africa, Northeast --
1
China
1
China --
1
Developing countries
1
Developing countries --
1
Egypt
1
Egypt --
1
Great Britain
1
Great Britain --
1
India
1
India --
1
Middle East
1
Middle East --
1
Pakistan
1
Pakistan --
1
Russia (Federation)
1
Russia (Federation) --
1
Turkey
1
Turkey --
1