Region
United States
700
Russia (Federation)
7
China
6
Iran
3
Australia
2
Canada
2
Europe
2
Great Britain
2
Illinois
2
Israel
2
Korea (North)
2
South Dakota
2
Texas
2
Balkan Peninsula
1
California
1
European Union countries
1
Ireland
1
Management
1
New York (State)
1
Nigeria
1
Security measures
1
Switzerland
1