Region
Asia
5
Asia --
5
Europe --
3
Pacific Area
3
Pacific Area --
3
United States --
3
Europe
2
Russia
2
Russia --
2
Southeast Asia
2
Southeast Asia --
2
Africa, Southern --
1
Arctic regions --
1
Argentina
1
Argentina --
1
Asia, Southeastern --
1
Canada --
1
East Asia
1
Europe, Eastern --
1
Falkland Islands --
1
Former Soviet republics --
1
Great Britain
1
Great Britain --
1
Indochina
1
Indochina --
1
Japan --
1
Soviet Union
1
Soviet Union --
1
United States
1