Region
United States
35
Developing countries
23
Colorado
3
China
2
Developed countries
2
India
2
Japan
2
Afghanistan
1
Africa
1
Africa South of the Sahara
1
Africa, Sub-Saharan
1
Andes Region
1
Asia
1
Canada
1
Caspian Sea
1
East Asia
1
Europe
1
Great Britain
1
Indonesia
1
Korea (North)
1
Las Vegas
1
Mesa County
1
Michigan
1
Nevada
1
Pitkin County
1
Russia (Federation)
1
West (U.S.)
1
Western Slope
1
Western Slope (Colo.)
1