Region
United States
128
Africa
9
Asia
8
Developing countries
5
Colorado
4
Europe
4
Great Britain
4
Japan
4
Canada
3
Australia
2
BRIC countries
2
China
2
Germany
2
Middle East
2
Singapore
2
Antarctica
1
Chicago
1
Chile
1
Copiapó
1
Iceland
1
Illinois
1
India
1
Iraq
1
Korea (South)
1
Latin America
1
Malawi
1
Massachusetts
1
Netherlands
1
North America
1
Springfield
1
Thailand
1
West (U.S.)
1