Region
United States
37
Canada
23
Developing countries
16
États-Unis
16
Australia
13
Eastern Europe
13
Europe
13
Europe, Eastern
13
Africa
9
China
8
Colorado
8
Great Britain
8
India
8
Latin America
8
East Asia
7
Middle East
7
Pakistan
7
Southern States
7
Brazil
6
Central Europe
6
Europe, Central
6
OECD countries
6
Pays en voie de développement
6
Poland
6
Russia (Federation)
6
Arizona
5
Asia
5
Chile
5
Colombia
5
Italy
5
Kentucky
5
New York (State)
5
North Carolina
5
Norway
5
Spain
5
Texas
5
Finland
4
Germany
4
Illinois
4
Indonesia
4
Korea (South)
4
Mexico
4
Michigan
4
Middle West
4
New England
4
New Jersey
4
New Zealand
4
Ohio
4
Pacific Area
4
Pennsylvania
4
more ...