Region
United States
17
Great Britain
5
Germany
3
Brazil
2
Developing countries
2
Europe
2
Italy
2
Liberia
2
Africa, North
1
Angola
1
Boston (Mass.)
1
China
1
Detroit
1
Detroit (Mich.)
1
India
1
Indonesia
1
Iran
1
Japan
1
Korea
1
Korea (South)
1
Latin America
1
Michigan
1
New York (N.Y.)
1
North Africa
1
North America
1
Persian Gulf Region
1
Puerto Rico
1
South Asia
1
Southern States
1
Soviet Union
1
Spain
1