Region
United States
158
Colorado
21
China
4
Hawaii
4
Developing countries
3
Europe
3
Great Britain
3
American Samoa
2
California
2
Japan
2
Ohio
2
Pennsylvania
2
Washington (D.C.)
2
Alaska
1
Annapolis
1
Arizona
1
Atlanta
1
Canon City
1
Chicago
1
Cleveland
1
Earth
1
Ebensburg
1
Former Soviet republics
1
Fort Huachuca
1
Georgia
1
Greenville
1
Guam
1
Haverford
1
Illinois
1
Indonesia
1
Maluku
1
Marple (Pa. : Township)
1
Maryland
1
Michigan
1
Montana
1
North America
1
Northwest, Pacific
1
Oregon
1
Sacramento Municipal Utility District (Calif.)
1
Salem
1
Santa Barbara
1
Sri Lanka
1
Tennessee River Valley
1
United States Virgin Islands
1
West (U.S.)
1