Region
United States
447
Colorado
23
U.S. states
10
China
4
Latin America
3
Pennsylvania
3
California
2
Canada
2
Developing countries
2
Kentucky
2
Montana
2
New Mexico
2
Alaska
1
Allentown
1
Anchorage
1
Arizona
1
Asia, Central
1
Baltimore
1
Europe
1
Georgia
1
India
1
Japan
1
Los Angeles
1
Maryland
1
Michigan
1
Minnesota
1
Oregon
1
Peru
1
Puerto Rico
1
Rhode Island
1
Texas
1
West Virginia
1
Wisconsin
1