United States 1,907
Europe 85
Great Britain 78
Canada 77
China 61
Germany 53
Africa 50
Developing countries 41
Australia 40
Colombia 36
Soviet Union 36
États-Unis 30
Japan 30
Latin America 30
Mexico 30
California 29
Asia 23
England 23
India 20
Brazil 18
North America 17
Spain 16
Antarctica 15
Arctic regions 15
Middle East 14
Netherlands 14
Québec (Province) 14
Scandinavia 14
Arctic Regions 13
Europe, Eastern 13
European Union countries 13
Ontario 13
Outer space 13
South Africa 13
Bangladesh 12
Italy 12
Québec 12
Alabama 11
Eastern Europe 11
Egypt 11
France 11
Polar regions 11
Southeast Asia 11
America 10
Macon County 10
Pacific Area 10
Pakistan 10
Alaska 9
New York (State) 9
Russia (Federation) 9
Chile 8
Cuba 8
Florida 8
New York 8
Austria 7
London 7
Louisiana 7
Massachusetts 7
Montréal 7
New Zealand 7
Southern States 7
Sweden 7
USA 7
Australie 6
Caribbean Area 6
East Asia 6
Germany (West) 6
New Mexico 6
Oregon 6
Singapore 6
South America 6
Tropics 6
Washington (State) 6
Africa, Southern 5
Africa, Sub-Saharan 5
Arab countries 5
Denmark 5
Eurasia 5
Hawaii 5
Illinois 5
Indonesia 5
Iraq 5
Israel 5
Japon 5
Maine 5
Nigeria 5
Oceania 5
Poland 5
Sri Lanka 5
Texas 5
Venezuela 5
Allemagne 4
Arizona 4
Belgium 4
British Columbia 4
CHILE 4
Grande-Bretagne 4
Hungary 4
Indiana 4
Iran 4