Region
United States - --
United States
11
United States --
4
Australia
1
Australia --
1
Central America
1
Central America - --
1
Developing countries
1
Developing countries - --
1
Eastern Europe
1
Eastern Europe - --
1
Europe
1
Europe - --
1
Europe --
1
European Economic Community countries --
1
Foreign countries
1
India
1
India - --
1
India --
1
Japan - --
1
New Zealand
1
New Zealand --
1
South Asia
1
South Asia --
1
Soviet Union
1
Soviet Union - --
1