Region
Africa
3
Algeria
1
Asia
1
Australia
5
Belgium
2
Brazil
3
California
1
Canada
19
Colombia
2
Czech Republic
2
Denmark
1
Developing countries
4
England
2
Ethiopia
2
Europe
11
Europe Union countries
1
Europe, Eastern
1
European Economic Community countries
1
European Union countries
14
Former Soviet republics
1
Germany
5
Ghana
1
Great Britain
15
India
1
Ireland
3
Israel
3
Italy
2
Japan
3
Latin America
4
Mexico
3
Middle East
1
Netherlands
2
New Zealand
1
Oceania
1
Papua New Guinea
2
Scotland
1
Singapore
1
South Asia
1
Soviet Union
2
Spain
2
Taiwan
2
Thailand
2
Turkey
1
United States
179
Virginia
1
Washington (D.C.)
2