Region
United States
78
California
6
Iran
6
England
4
Sweden
3
Switzerland
3
Wales
3
New Mexico
2
Pacific States
2
Pennsylvania
2
Russia (Federation)
2
Slovakia
2
Argentina
1
Atlantic States
1
Copenhagen
1
Crimea
1
Denmark
1
Egypt
1
Great Lakes
1
Gulf States
1
Idaho
1
Minnesota
1
Mississippi River Watershed
1
Mississippi Valley
1
Missouri River Watershed
1
Missouri Valley
1
New England
1
North central states
1
Norway
1
Nouvelle-Angleterre
1
Ohio River Watershed
1
Ohio Valley
1
Philadelphia
1
Poland
1
Russie
1
Scotland
1
Serbia
1
South Atlantic States
1
Southern states
1
Tatarie
1
Tatarstan
1
Thailand
1
Ukraine
1
Washington (D.C.) Region
1
Washington Region
1