Region
United States
30
China
27
Latin America
22
Developing countries
18
Europe, Eastern
13
Eastern Europe
12
Asia
11
East Asia
11
Africa
10
Southeast Asia
10
European Union countries
9
India
8
Soviet Union
7
Ukraine
5
Caribbean Area
4
Europe
4
Former Soviet republics
4
Germany
4
Great Britain
4
Japan
4
Africa, Sub-Saharan
3
European Economic Community countries
3
Indonesia
3
Sub-Saharan Africa
3
Tanzania
3
Bangladesh
2
Canada
2
Central Europe
2
Chile
2
Chine
2
Europe, Central
2
Hungary
2
Korea (North)
2
Pacific Area
2
Russia (Federation)
2
Singapore
2
South Africa
2
Uganda
2
Vietnam
2
Afghanistan
1
Africa, Southern
1
Amérique latine
1
Andes Region
1
Arab countries
1
Asie du Sud-Est
1
Australia
1
Balkan Peninsula
1
Belarus
1
Benin
1
Bhutan
1
more ...