Region
United States
742
Great Britain
31
Colorado
14
England
12
California
11
Canada
11
Europe
11
China
10
France
8
New York (State)
7
North America
6
Developing countries
5
Massachusetts
5
Africa
4
Minnesota
4
Pennsylvania
4
Australia
3
Denver
3
London
3
Mexico
3
New York
3
Soviet Union
3
West (U.S.)
3
Alabama
2
America
2
Boston
2
Burma
2
Detroit
2
East Asia
2
Hiroshima-shi (Japan)
2
Japan
2
Kansas
2
Laos
2
London (England)
2
Michigan
2
Nigeria
2
Rocky Mountains Region
2
Roseto
2
Roseto (Pa.)
2
Russia
2
Saint Lucia
2
Southern States
2
Southwest, New
2
Virginia
2
Wisconsin
2
Alaska
1
Appalachian Region
1
Arizona
1
Asia
1
Austria
1
more ...