Subject Region
United States
488
Great Britain
46
Latin America
43
China
31
Developing countries
25
Europe
23
India
22
South Africa
21
Canada
19
France
16
Mexico
14
America Latina
13
European Union countries
13
Brazil
12
Peru
12
New York (State)
10
New York
9
Caribbean Area
8
Cuba
8
Developed countries
8
Germany
8
Japan
8
Scandinavia
7
Australia
6
California
6
England
6
Africa
5
Chile
5
Israel
5
Massachusetts
5
New York (N.Y.)
5
South Asia
5
Southern States
5
Boston
4
Chicago
4
Connecticut
4
Illinois
4
North Carolina
4
Russia (Federation)
4
Soviet Union
4
Spain
4
Uruguay
4
Colombia
3
Costa Rica
3
East Asia
3
Espana
3
Greece
3
Harpers Ferry (W. Va.)
3
Himalaya Mountains Region
3
Hong Kong
3
more ...