Subject Region
Developing countries
37
United States
33
Latin America
19
China
8
Europe
6
Europe, Eastern
6
European Union countries
6
Asia
5
Germany
5
Russia (Federation)
5
Africa, Sub-Saharan
4
Israel
4
Africa
3
Central America
2
Chile
2
Ghana
2
Hungary
2
Japan
2
Peru
2
South Africa
2
Southeast Asia
2
Southern Cone of South America
2
Turkey
2
America Latina
1
Arab countries
1
Brazil
1
Caribbean Area
1
Colombia
1
Côte d'Ivoire
1
East Asia
1
Egypt
1
European Economic Community countries
1
France
1
Germany (East)
1
Great Britain
1
Greece
1
Mexico
1
Middle East
1
Morocco
1
North America
1
Rwanda
1
South America
1
Soviet Union
1
Uganda
1
Venezuela
1
Yugoslavia
1