Subject Region
United States
52
China
30
Latin America
20
Europe
19
Great Britain
19
India
13
Russia (Federation)
10
Europe, Eastern
9
Mexico
9
South Africa
8
France
7
Iran
7
Cuba
6
England
6
Arab countries
5
Australia
5
Germany
5
Greece
5
Japan
5
Southern States
5
Soviet Union
5
America Latina
4
Canada
4
Egypt
4
Hong Kong
4
Hong Kong (China)
4
Ireland
4
Johannesburg
4
Lagos
4
Lagos (Nigeria)
4
Massachusetts
4
Moscow (Russia)
4
New York (State)
4
Nigeria
4
North Carolina
4
Poland
4
Argentina
3
Brazil
3
California
3
Germany (West)
3
Indonesia
3
Kerala (India)
3
Mediterranean Region
3
Scandinavia
3
Shanghai
3
Tajikistan
3
Turkey
3
Ukraine
3
Achit (Russia)
2
Africa
2
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