Region
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Singapore
4
South Asia
4
Sweden
4
Vietnam
4
Western countries
4
Chile
3
Egypt
3
England
3
Ethiopia
3
Greece
3
Indonesia
3
Korea (North)
3
Los Angeles
3
Moscow (Russia)
3
New Mexico
3
Outer space
3
Poland
3
Somalia
3
Alabama
2
Algeria
2
Brazil, Northeast
2
Burkina Faso
2
Central America
2
Congo (Democratic Republic)
2
Denmark
2
English-speaking countries
2
Grand Forks Air Force Base (N.D.)
2
Guyana
2
Hong Kong (China)
2
Iran
2
Laos
2
Los Alamos
2
Malaya
2
Malaysia
2
Marshall Islands
2
Moscow
2
Nicaragua
2
Nuremberg
2
Okinawa Island
2
Ontario
2
Pacific Islands (Trust Territory)
2
Pittsburgh
2
Pittsburgh (Pa.)
2
San Francisco
2
Saratov (Russia)
2
Spain
2
USSR
2
Vatican City
2
Venezuela
2
Washington (D.C.)
2
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