Subject Region
United States
236
Developing countries
30
European Union countries
25
Latin America
23
India
22
Japan
21
China
19
Great Britain
19
Mexico
19
Europe
18
Caribbean Area
13
Canada
11
Africa, Sub-Saharan
9
Europe, Eastern
9
Espana
8
Spain
8
Colombia
6
European Economic Community countries
6
Indonesia
6
Middle East
6
Romania
6
Africa
5
Cyprus
5
Ecuador
5
England
5
Italy
5
Kosovo (Republic)
5
Nigeria
5
Peru
5
Russia (Federation)
5
South Africa
5
Turkey
5
Asia
4
Austria
4
Developed countries
4
East Asia
4
Europe, Central
4
Former Soviet republics
4
France
4
Saint Kitts and Nevis
4
Ukraine
4
Africa, North
3
Albania
3
Asia, Central
3
Australia
3
Burkina Faso
3
Cambodia
3
Germany (West)
3
Ghana
3
Greece
3
更多 ...