Region
United States --
260
United States
190
United states --
28
China
22
China --
22
Soviet Union --
21
Soviet Union
20
Asia
13
Asia --
13
Europe --
12
Japan --
12
Japan
11
Middle East
11
Europe
10
Middle East --
10
Israel
9
Israel --
9
Latin America
7
Latin America --
7
Great Britain --
6
Central America --
5
Asia, Southeastern
4
Asia, Southeastern --
4
Central America
4
East Asia
4
Europe, Eastern
4
Europe, Eastern --
4
Great Britain
4
Iran --
4
Islamic countries --
4
Vietnam --
4
Caribbean Area
3
Caribbean Area --
3
Developing countries --
3
East Asia --
3
Foreign countries
3
India
3
India --
3
Indonesia
3
Indonesia --
3
Iran
3
Islamic countries
3
Pacific area --
3
Panama --
3
Philippines
3
Philippines --
3
Russia (Federation)
3
Russia (Federation) --
3
Taiwan --
3
Vietnam
3
more ...