Region
United States
267
Great Britain
77
Developing countries
68
Europe
62
China
52
Germany
27
Japan
21
France
17
Africa
16
India
13
Soviet Union
11
Europe, Eastern
10
Latin America
10
Canada
9
Australia
8
East Asia
8
Russia (Federation)
8
Washington (D.C.)
8
Austria
7
Italy
7
Southern States
7
Taiwan
7
Afghanistan
6
England
6
Germany (West)
6
Greece
6
Korea (South)
6
États-Unis
6
America
5
Middle East
5
New York (State)
5
Appalachian Region
4
Asia
4
Brazil
4
California
4
Developed countries
4
European Economic Community countries
4
Hungary
4
Ireland
4
Mexico
4
Netherlands
4
Rome
4
Russia
4
Sweden
4
Allemagne
3
Caribbean Area
3
Grande-Bretagne
3
Indian Ocean
3
Kentucky
3
Korea
3
more ...