Region
United States
10
United States --
10
Soviet Union --
6
Soviet Union
4
United states --
4
Great Britain
2
Great Britain --
2
Afghanistan
1
Afghanistan --
1
Africa, Northeast
1
Africa, Northeast --
1
Asia, Southeastern
1
Asia, Southeastern --
1
Australia
1
Australia --
1
Developing countries
1
Developing countries --
1
Egypt
1
Egypt --
1
India
1
India --
1
Indonesia --
1
Middle East
1
Middle East --
1
Pakistan
1
Pakistan --
1
Russia (Federation) --
1
Turkey
1
Turkey --
1