Region
Europe
20
Europe --
United States
6
United States --
6
North America --
2
Russia (Federation)
2
Russia (Federation) --
2
Canada
1
East Asia --
1
European Union Countries --
1
Former Soviet republics
1
Former Soviet republics --
1
France --
1
Germany
1
Germany --
1
Great Britain
1
Great Britain --
1
Japan
1
Japan --
1
North America
1