Region
Europe --
34
Europe
12
Europe, Eastern --
7
Europe, Eastern
6
United States --
4
Middle East
2
Middle East --
2
Asia --
1
Canada
1
Central Europe --
1
Commonwealth of Nations
1
Developing countries
1
Developing countries --
1
Europe, Central
1
Europe, Central --
1
Former Soviet republics --
1
Germany (West)
1
Germany (West) --
1
India
1
India --
1
Iran
1
Korea (North)
1
Korea (North) --
1
North Atlantic --
1
Saudi Arabia
1
Soviet Union
1
Soviet Union --
1
United States
1