Region
United States --
26
United States
19
Soviet Union --
7
Europe --
6
Japan --
6
Russia (Federation)
5
Russia (Federation) --
5
China --
4
Europe
4
Soviet Union
4
Asia
3
Australia --
3
China
3
Former Soviet republics --
3
Israel
3
Asia --
2
Australia
2
Canada --
2
Caribbean Area --
2
East Asia
2
East Asia --
2
Former Soviet republics
2
Japan
2
Latin America --
2
Malaysia
2
Southeast Asia
2
Africa, North
1
Africa, North --
1
Arab countries
1
Asia Pacific Region
1
Cambodia
1
Caribbean Area
1
Developing countries --
1
East Timor
1
Europe, Eastern --
1
France --
1
Germany --
1
Great Britain
1
Great Britain --
1
Hungary
1
Hungary --
1
India
1
India --
1
Indo-Pacific Region --
1
Israel --
1
Italy --
1
Korea
1
Korea (North) --
1
Korea (South)
1
Korea --
1
more ...