Region
United States
223
Developing countries
72
Great Britain
53
Europe
52
China
49
Germany
22
Japan
22
France
13
Africa
12
Europe, Eastern
11
Latin America
11
Soviet Union
11
Canada
10
India
10
Russia (Federation)
9
East Asia
8
Washington (D.C.)
8
Southern States
7
Taiwan
7
Afghanistan
6
Asia
6
Germany (West)
6
Italy
6
Korea (South)
6
Middle East
6
États-Unis
6
Brazil
5
New York (State)
5
America
4
Appalachian Region
4
Australia
4
California
4
Developed countries
4
England
4
European Economic Community countries
4
Greece
4
Netherlands
4
Rome
4
Allemagne
3
Caribbean Area
3
Grande-Bretagne
3
Kentucky
3
Korea
3
Las Vegas
3
Las Vegas (Nev.)
3
Malaysia
3
Missouri
3
Nevada
3
New York
3
New York (N.Y.)
3
more ...