Region
2
1
Algeria
1
Argentina
3
Asia
3
Australia
6
Australie
1
Bahrain
1
Balkan Peninsula
1
Bangladesh
1
Brazil
2
Cameroon
1
Canada
2
Chile
1
China
4
Colombia
4
Colombie
1
Communist countries
1
Czechoslovakia
1
Developing countries
3
Eastern Europe
1
Egypt
1
Etats-Unis d'Amérique
1
Europe
2
Europe, Eastern
1
États-Unis
4
France
2
Germany
2
Ghana
1
Great Britain
3
Greece
1
India
2
Indonesia
1
Iran
1
Ireland
1
Italy
2
Japan
1
Kazakhstan
1
Korea (South)
2
Latin America
3
Malaysia
1
Mexico
1
Morocco
1
Mozambique
1
New England
1
New Zealand
2
Nigeria
1
Northeastern States
1
OECD countries
3
Pakistan
1
Peru
2
more ...