Region
United States
687
Colorado
20
Louisiana
10
China
7
New York (State)
7
Gulf States
6
Developing countries
5
Europe
5
Mexico, Gulf of
5
Oregon
5
Alaska
4
Hawaii
4
Mexico
4
North Carolina
4
Alabama
3
Florida
3
Washington (D.C.)
3
Africa, Sub-Saharan
2
Asia
2
California
2
European Economic Community countries
2
European Union countries
2
Georgia
2
Germany
2
Gulf Coast (U.S.)
2
India
2
Iowa
2
Italy
2
Japan
2
Africa
1
Anacostia (Washington, D.C.)
1
Arctic National Wildlife Refuge (Alaska)
1
Arizona
1
Buffalo
1
California, Northern
1
Canada
1
Centennial
1
Cherokee Indian Reservation
1
Denver
1
Eastern Band of Cherokee Indians
1
Florida Keys
1
Florida Keys (Fla.)
1
Gold King Mine (San Juan County, Colo.)
1
Houston
1
Hudson
1
Illinois
1
Indonesia
1
Jacksonville
1
Kansas
1
Kosovo (Republic)
1
more ...