Region
United States
11
Central America
4
Latin America
4
China
3
Developing countries
3
Africa
2
Europe
2
Great Britain
2
Soviet Union
2
Vietnam
2
Africa, Sub-Saharan
1
Brazil
1
Chang-chuang, China (Shansi Province)
1
Chile
1
China (People's Republic of China, 1949- )
1
Developed countries
1
Germany
1
Greece
1
India
1
Japan
1
Napanee
1
Nicaragua
1
Ontario
1
Poland
1
Russia
1
South Asia
1