Subject Region
United States
1,721
Great Britain
343
Canada
124
England
113
Europe
72
Developing countries
43
China
41
India
36
London
36
Australia
34
Spain
31
North America
30
Germany
29
Japan
29
France
27
New York (State)
27
California
24
Africa
23
Netherlands
21
New York
21
Ireland
20
Mexico
20
Pennsylvania
20
Italy
19
Ontario
16
South Africa
16
European Union countries
15
Cuba
13
Africa, Sub-Saharan
12
Colombia
12
Asia
11
Espana
11
Indonesia
11
Québec (Province)
11
Southern States
11
Brazil
10
Scotland
10
Kenya
9
Latin America
9
Russia (Federation)
9
Vietnam
9
East Asia
8
Israel
8
Los Angeles
8
Massachusetts
8
New Mexico
8
New Zealand
8
Pacific Area
8
Wales
8
Argentina
7
more ...