Region
United States
929
China
17
Europe
10
Japan
9
Colorado
6
European Union countries
4
Korea (South)
4
Russia (Federation)
4
Washington (D.C.)
3
Developing countries
2
Latin America
2
Asia
1
California, Southern
1
East Asia
1
European Economic Community countries
1
Germany
1
Great Britain
1
Hong Kong
1
Korea
1
Mexico
1
Middle West
1
North Dakota
1
Outer space
1
Peru
1
Singapore
1
Taiwan
1
Texas
1
Thailand
1
Vietnam
1
Washington (State)
1