Region
Africa
2
Asia
2
Australia
1
Canada
1
Caribbean Area
1
China
13
Commonwealth of Nations
1
Communist countries
1
Czechoslovakia
1
Developing countries
20
Developingcountries
1
East Asia
1
Europe
4
Europe, Eastern
6
European Economic Community countries
3
European Union countries
2
Former Soviet republics
4
Great Britain
4
Japan
1
Latin America
5
Nepal
1
Netherlands
1
Nigeria
2
Pacific Area
1
Russia
1
Russia (Federation)
4
Ukraine
1
United States
8
Zambia
1