Oblast
Developing countries
21
United States
9
Great Britain
5
Europe
4
East Asia
2
South Africa
2
Argentina
1
Asia, Central
1
Balkan Peninsula
1
Belarus
1
China
1
Colombia
1
Europe, Eastern
1
Germany
1
Germany (West)
1
India
1
KwaZulu-Natal
1
Latin America
1
Nicaragua
1
North America
1
Southeast Asia
1
Southeat Asia
1
Soviet Union
1