Subject Region
United States
30
Germany
9
Great Britain
6
Japan
5
New York (State)
5
Switzerland
5
Canada
4
Colombia
4
Europe
4
New York
4
Latin America
3
Netherlands
3
Argentina
2
Chennai
2
England
2
India
2
Africa
1
Africa, Sub-Saharan
1
America Latina
1
Arab countries
1
Austria
1
Boyaca (Colombia)
1
China
1
Croatia
1
East Asia
1
Espana
1
France
1
Germany (West)
1
Illinois
1
Karlsruhe
1
Middle East
1
Northwest, Pacific
1
Poland
1
Russia (Federation)
1
Spain
1
Venezuela
1
Washington (D.C.)
1
Yugoslavia
1