Region
United States
21
Soviet Union
16
Great Britain
13
China
8
Germany
7
England
5
Caribbean Area
3
India
3
Europe
2
Europe, Eastern
2
France
2
Ireland
2
Japan
2
New York
2
New York (State)
2
Poland
2
Africa
1
Africa, Sub-Saharan
1
Czechoslovakia
1
Delhi
1
Georgia
1
Germany (East)
1
Germany (West)
1
Greece
1
Italy
1
London
1
London (England)
1
Middle East
1
Nanjing (Jiangsu Sheng, China)
1
North America
1
Oceania
1
Qingdao (China)
1
Rome
1
Russia
1
South Asia
1
Spain
1