Region
United States
United States --
China --
78
China
67
Soviet Union --
65
Soviet Union
63
United states --
39
Japan
37
Japan --
37
Asia
34
Asia --
33
Middle East
33
Middle East --
32
Europe
28
Europe --
28
Israel --
24
Israel
20
Great Britain --
19
Latin America
19
Latin America --
18
Great Britain
17
Developing countries
16
East Asia
16
Iran --
16
East Asia --
15
India
15
India --
15
Iran
15
Taiwan --
14
Central America --
12
Russia (Federation) --
12
Taiwan
12
Asia, Southeastern
11
Asia, Southeastern --
11
Russia (Federation)
11
Central America
10
Russia --
10
Afghanistan --
9
Developing countries --
9
Russia
9
Vietnam
9
Vietnam --
9
Afghanistan
8
Iraq
8
Caribbean Area --
7
Indonesia
7
Indonesia --
7
Iraq --
7
Korea
7
Korea --
7
more ...