Region
Europe --
Europe
37
United States --
13
United States
10
Asia --
8
Asia
7
Islamic countries
2
Islamic countries --
2
Japan --
2
Middle East
2
Middle East --
2
Asia, Southeastern
1
Asia, Southeastern --
1
Canada
1
Developing countries --
1
European Economic Community countries
1
Great Britain
1
India
1
India --
1
Japan
1
Lebanon --
1
Russia
1
Russia --
1
Southeast Asia --
1
Soviet Union
1
Soviet Union --
1
State, The
1