Region
United States
168
Iraq
30
Russia (Federation)
30
Soviet Union
20
Former Soviet republics
16
Europe
13
China
12
Middle East
9
Africa, West
5
Great Britain
4
Japan
4
Korea (North)
4
Latin America
4
Iran
3
Ireland
3
Outer space
3
Cuba
2
Egypt
2
El Salvador
2
Guatemala
2
Honduras
2
Indian Ocean Region
2
Sierra Leone
2
Africa
1
Africa, East
1
Africa, Eastern
1
Africa, Southern
1
Asia
1
Asia, Central
1
Canada
1
Colombia
1
Developing countries
1
East Asia
1
England
1
European Union countries
1
France
1
Germany
1
Great Lakes (North America)
1
Israel
1
Italy
1
Jerewan
1
Liberia
1
Libya
1
London (England)
1
Mozambique
1
Oceania
1
Persian Gulf Region
1
Sinai
1
South Asia
1
Syria
1