Region
United States
132
Developing countries
30
Europe
18
Canada
15
East Asia
14
China
12
Asia
8
Africa
7
Europe, Eastern
6
Arctic regions
5
Pacific Area
5
Southern States
5
Africa, Sub-Saharan
4
Australia
4
Balkan Peninsula
4
Germany
4
Greece
4
India
4
Latin America
4
Mediterranean Region
4
Rome
4
Singapore
4
South Asia
4
America
3
England
3
European Union countries
3
Great Britain
3
Middle East
3
Mississippi
3
North America
3
Portugal
3
Southeast Asia
3
Byzantine Empire
2
Caribbean Area
2
Europe, Southern
2
Former Soviet republics
2
Himalaya Mountains Region
2
Iran
2
Islamic countries
2
Italy
2
Japan
2
Mexico
2
Netherlands
2
Outer space
2
Pacific Ocean
2
Russia (Federation)
2
South America
2
Soviet Union
2
Spain
2
Adriatic Sea Region
1
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