Region
United States
2,424
Colorado
66
California
20
Alaska
18
China
12
Texas
11
Developing countries
10
Canada
9
Montana
8
Puerto Rico
8
Florida
7
New Mexico
7
Oregon
7
Pennsylvania
7
Washington (State)
7
Great Britain
6
Hawaii
6
Arizona
5
Arkansas
5
Guam
5
Missouri
5
Nevada
5
New York (State)
5
Utah
5
European Union countries
4
Great Lakes (North America)
4
Idaho
4
India
4
Kansas
4
Mexico
4
North America
4
Ohio
4
South Carolina
4
South Dakota
4
Tennessee
4
Vermont
4
West Virginia
4
Africa
3
Alabama
3
Atlantic Coast (U.S.)
3
Beaufort Sea
3
France
3
Georgia
3
Great Plains
3
Illinois
3
Japan
3
Los Angeles County
3
Louisiana
3
Maine
3
Maryland
3
more ...