Region
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Africa, North
5
Arab countries
5
Asia, Central
5
Ecuador
5
Egypt
5
Maryland
5
New York
5
Nigeria
5
Pacific Area
5
Persian Gulf Region
5
Taiwan
5
Yugoslavia
5
America
4
Balkan Peninsula
4
California
4
Colombia
4
Congo (Democratic Republic)
4
Ethiopia
4
Europe, Central
4
Germany (West)
4
Ghana
4
Israel
4
Kentucky
4
Korea
4
Korea (North)
4
Korea (South)
4
Nicaragua
4
Pennsylvania
4
Persian Gulf States
4
Romania
4
Tennessee
4
Vietnam
4
Andes Region
3
Australia
3
Bangladesh
3
Georgia
3
Guatemala
3
Haiti
3
Hungary
3
Jordan
3
Kenya
3
Louisiana
3
Mexican-American Border Region
3
Michigan
3
Mississippi
3
Missouri
3
Northern Ireland
3
Pakistan
3
Scandinavia
3
South Carolina
3
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