Región
Europe
3
Great Britain
3
China
2
Developing countries
2
Egypt
2
England
2
Africa
1
Africa, Sub-Saharan
1
Australia
1
East Asia
1
Ecuador
1
Europe, Eastern
1
France
1
Germany
1
Iran
1
Iraq
1
Ireland
1
Latin America
1
Libya
1
Pacific Area
1
Pakistan
1
Romania
1
Scandinavia
1
Southeast Asia
1
Soviet Union
1
Sudan
1
Turkey
1
United States
1
Uruguay
1
Zimbabwe
1