Region
Russia (Federation)
United States
40
Ukraine
17
Former Soviet republics
8
China
4
Moldova
4
Georgia (Republic)
3
Soviet Union
3
Asia, Central
2
Balkan Peninsula
2
Crimea (Ukraine)
2
Europe
2
Montenegro
2
Azerbaijan
1
Baltic Sea Region
1
Belarus
1
Caucasus, Northern
1
Caucasus, Northern (Russia)
1
Chechni͡a (Russia)
1
Hungary
1
Iraq
1
Kazakhstan
1
Russia
1
Zimbabwe
1