Region
United States
24
Soviet Union
17
United States --
9
Germany (West)
5
Soviet Union --
4
East Asia
3
Europe
3
Iran
3
Iraq
3
Korea (North)
3
South Asia
3
Europe --
2
Former Soviet Republics
2
India
2
Middle East
2
Arctic region
1
Asia
1
Canada
1
Canada --
1
Former Soviet Rebuplics
1
Former Soviet republics
1
India --
1
Iran --
1
Iraq --
1
Japan
1
Korea (North) --
1
Korea (South)
1
Korea (South) --
1
Malaysia
1
Pacific Area --
1
Pakistan
1
Scandinavia --
1