Region
Egypt
Czechoslovakia
2
India
2
Iran
2
Suez Canal (Egypt)
2
Australia
1
Babylonia
1
Brazil
1
Colombia
1
Costa Rica
1
Double taxation
1
El Salvador
1
France
1
Germany
1
Great Britain
1
Greece
1
Iraq
1
Ireland
1
Irish Free State
1
Irish free state
1
Italian Somaliland
1
Japan
1
Jordan
1
Norway
1
Peru
1
Romania
1
Salvador
1
Somalia
1
Suez Canal
1
Tunisia
1
United States
1