Region
Africa
6
Argentina
1
Australia
1
Bremen
2
California
1
Canada
7
China
1
Colorado
1
Developing countries
2
Ecuador
1
England
2
Europe
2
European Union countries
1
Germany
4
Ghana
1
Great Britain
2
Guatemala
1
Gulf Province
2
Gulf Province (Papua New Guinea)
2
India
2
Iowa
1
Latin America
1
London
1
London (England)
1
Mexico
1
New York (N.Y.)
1
New York (State)
2
New York (État)
1
Oregon
2
Papua New Guinea
2
Prairie Provinces
1
Singapore
1
South America
1
Stanford
1
Switzerland
1
Uganda
2
United States
119
Washington (D.C.)
1