Region
United States --
50
United States
37
Europe --
33
China --
23
Soviet Union --
22
Great Britain --
19
Europe
14
Soviet Union
14
Middle East --
13
Europe, Eastern --
12
Great Britain
12
Japan --
12
Philippines --
11
Indonesia --
10
South Africa --
10
Africa --
8
China
8
Europe, Eastern
7
France --
7
India --
7
Indonesia
7
Iran --
7
Latin America --
7
Philippines
7
South Africa
7
Arab countries --
6
Asia --
6
Argentina --
5
Asia
5
Germany (West) --
5
India
5
Latin America
5
Mexico --
5
Sudan --
5
Africa
4
Egypt
4
Egypt --
4
France
4
Germany --
4
Iran
4
Japan
4
Mexico
4
Middle East
4
Nigeria --
4
Palestine --
4
Taiwan --
4
Argentina
3
Austria --
3
Czechoslovakia --
3
Former Soviet republics --
3
more ...