Region
United States
7
United States --
5
Europe
2
Former Soviet republics
2
Former Soviet republics --
2
Southeast Asia
2
Africa, Northeast
1
Asia, Southeastern
1
Caucasus, Northern
1
Central America
1
East Asia --
1
Europe --
1
Europe, Central
1
Europe, Eastern
1
Korea (North)
1
Korea (North) --
1
Russia(Federation) --
1
Soviet Union --
1
Ukraine --
1
United states --
1