Region
United States
73
Washington (D.C.)
7
Western countries
6
Africa
5
Europe
5
Developing countries
4
Russia (Federation)
4
China
3
East Asia
3
India
3
South Africa
3
Argentina
2
Brazil
2
Central America
2
Great Britain
2
Greece
2
Japan
2
Latin America
2
New Zealand
2
North America
2
Peru
2
America
1
Aregntina
1
Azerbaijan
1
Bolivia
1
Cambodia
1
Canada
1
Developed countries
1
European Union countries
1
Germany
1
Hong Kong (China)
1
Jamaica
1
Nigeria
1
South America
1
Thailand
1
Uganda
1
Zimbabwe
1