Region
United States
167
Russia (Federation)
40
Korea (North)
35
Soviet Union
24
Former Soviet republics
22
China
16
Europe
11
Korea (South)
7
Great Britain
6
Iran
6
East Asia
5
South Asia
5
Germany (West)
3
Iraq
3
Canada
2
Hiroshima-shi (Japan)
2
India
2
Libya
2
Pakistan
2
Russia
2
Argentina
1
France
1
Georgia
1
Germany
1
Germany (East)
1
Japan
1
Kazakhstan
1
Latin America
1
New York
1
New York (State)
1
South Africa
1
Ukraine
1