Region
United States --
164
United States
124
Soviet Union --
58
Soviet Union
50
Great Britain --
34
Japan --
31
China --
24
Great Britain
23
Europe --
22
India --
18
Asia --
14
Germany --
14
Japan
14
United states --
14
Asia
13
South Africa --
13
Asia, Southeastern --
12
China
12
Latin America --
12
Europe
10
Germany
10
India
10
Israel --
10
Middle East --
10
Russia --
10
South Africa
10
East Asia --
9
Malaysia
9
Asia, Southeastern
8
Developing countries
8
Latin America
8
Russia
8
Australia --
7
France --
7
Malaysia --
7
Middle East
7
Central America
6
East Asia
6
France
6
Indonesia --
6
Korea --
6
Turkey --
6
United States - --
6
Argentina
5
Argentina --
5
Canada --
5
Central America --
5
Germany (West) --
5
Indonesia
5
Iran --
5
more ...