Region
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Asia
8
Colombia
8
North Dakota
8
Northeastern States
8
Oceania
8
Saudi Arabia
8
South Africa
8
Tropics
8
United Arab Emirates
8
Vietnam
8
Barbados
7
Brazil
7
Chicago
7
Denmark
7
Germany (West)
7
Guantánamo Bay Naval Base
7
Mexican-American Border Region
7
Micronesia
7
Romania
7
Ukraine
7
Arctic regions
6
Atlanta
6
Charleston
6
Chile
6
Czech Republic
6
European Economic Community countries
6
Hungary
6
Iraq
6
Jamaica
6
Lithuania
6
Marshall Islands
6
Nebraska
6
Northern Mariana Islands
6
Norway
6
Oklahoma City
6
Panama
6
Spain
6
Switzerland
6
USA
6
Africa, North
5
Arab countries
5
Arctic National Wildlife Refuge (Alaska)
5
Baltic Sea
5
Boston
5
Bulgaria
5
Clark County
5
Columbia River Valley
5
Detroit
5
Egypt
5
England
5
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