Geographic Subject
Costa Rica
26
Colombia
18
United States
14
Chile
8
Ecuador
6
India
5
Argentina
4
Mongolia
4
Dominican Republic
3
Pakistan
3
États-Unis
3
Brazil
2
Colombie
2
Indonesia
2
Mexico
2
Soviet Union
2
Tanzania
2
Thailand
2
Venezuela
2
Bolivia
1
Cuba
1
El Salvador
1
Great Britain
1
Haiti
1
Nepal
1
Panama
1
Peru
1
Unión Soviética
1