Region
United States
129
China
18
États-Unis
13
Australia
10
New Jersey
10
Europe
9
Canada
8
India
8
European Economic Community countries
7
Developing countries
5
France
5
Japan
5
Northeastern States
5
Oklahoma
5
Russia (Federation)
5
Argentina
4
Australie
4
Europe, Eastern
4
Illinois
4
Latin America
4
Mexico
4
Africa, East
3
Asia
3
Brazil
3
Etats-Unis d'Amérique
3
Great Britain
3
Peru
3
ESTADOS UNIDOS
2
Eastern Europe
2
Italy
2
Nicaragua
2
Soviet Union
2
Sweden
2
2
1
4
1
Africa
1
Africa, West
1
Afrique orientale anglophone
1
Allemagne
1
Altiplano
1
Argentine
1
Asie
1
Balkan Peninsula
1
Balkans
1
Chile
1
Communist countries
1
Costa Rica
1
Czechoslovakia
1
El Salvador
1
Etats-Unis (Middle West)
1
more ...