Region
United States
58
China
6
Russia (Federation)
4
Europe
3
Soviet Union
3
Africa
2
Egypt
2
European Union countries
2
Germany
2
Great Britain
2
Africa South of the Sahara
1
Africa, Sub-Saharan
1
Arab countries
1
Athens
1
Athens (Greece)
1
Confederate States of America
1
France
1
Greece
1
Israel
1
Lebanon
1
Netherlands
1
Palestine
1