Subject Region
United States
177
Great Britain
90
Spain
61
China
55
Espana
46
England
36
France
31
Mexico
27
Europe
23
Latin America
19
Italy
15
India
14
Germany
12
Japan
12
South Africa
12
Developing countries
11
Peru
9
Soviet Union
9
New England
8
Pennsylvania
8
Bolivia
7
Canada
7
Indonesia
7
London
7
Massachusetts
7
New York (State)
7
Brazil
6
Ghana
6
Poland
6
Russia (Federation)
6
Afghanistan
5
Africa
5
America Latina
5
Andes Region
5
European Union countries
5
Greece
5
Israel
5
London (England)
5
Maine
5
Russia
5
Africa, Sub-Saharan
4
Australia
4
Ecuador
4
Europe, Eastern
4
Europe, Western
4
Francia
4
Kenya
4
Minnesota
4
Nigeria
4
Tanzania
4
more ...