Subject Region
United States
289
Canada
24
Great Britain
9
Developing countries
7
Europe
7
France
6
Germany
5
Massachusetts
4
Netherlands
4
India
3
Japan
3
Oregon
3
Belgium
2
China
2
Latin America
2
New York (State)
2
Vietnam
2
Argentina
1
Bulgaria
1
Burkina Faso
1
Colombia
1
Cuba
1
Denmark
1
Hawaii
1
Korea (South)
1
New York
1
North America
1
Norway
1
OECD countries
1
Québec (Province)
1
Saskatchewan
1
Singapore
1
Switzerland
1
Taiwan
1
Tennessee
1
Vermont
1