Region
Africa, Sub-Saharan
1
Alabama
1
Alaska
7
American Samoa
1
Arizona
1
Asia
3
Asia, Central
1
Atlantic Coast (New England)
1
Australia
7
BRIC countries
4
Bennington
1
Birmingham Metropolitan Area
1
Bradford County
1
Brazil
2
California
30
Cambodia
1
Canada
6
Carrollton
1
Chapel Hill
1
Chile
1
China
6
Cleveland
1
Clinton County
1
Coeur d'Alene River, South Fork
1
Coeur d'Alene River, South Fork (Idaho)
1
Colombia
2
Colorado
2
Connecticut
4
Delaware
2
Denver
1
Developing countries
4
Devon
1
EE.UU
1
East Asia
1
England
13
Estados Unidos
1
Etats-Unis
1
Europe
28
Europe, Northern
1
European Economic Community countries
3
European Union countries
19
Fairbanks
1
Fairbanks (Alaska)
1
Finland
1
Florida
5
France
2
Georgia
3
Germany
18
Germany (West)
1
Great Britain
72
more ...