Region
United States
2,586
Washington (D.C.)
117
New Zealand
21
Canada
13
Great Britain
11
China
7
Developing countries
7
European Union countries
7
Colombia
6
Australia
5
India
5
Israel
5
Asia
3
Egypt
3
Europe
3
Europe, Eastern
3
Minnesota
3
New York (State)
3
Québec (Province)
3
Africa
2
Africa, Sub-Saharan
2
Argentina
2
British Columbia
2
California
2
France
2
Germany
2
Gulf Coast (U.S.)
2
Latin America
2
Mexico
2
Mississippi River
2
North America
2
North Carolina
2
Ontario
2
Potosi
2
Québec (Province)
2
Russia
2
Soviet Union
2
Thailand
2
Wisconsin
2
Afghanistan
1
Africa, Eastern
1
Alabama
1
Alaska
1
Appalachian Region
1
Arab countries
1
Austria
1
Baden
1
Baden (Germany)
1
Brazil
1
Central America
1
more ...