Region
European Union countries
154
Europe
10
Great Britain
6
European Economic Community countries
4
Netherlands
3
United States
3
Austria
2
Germany
2
Russia (Federation)
2
Switzerland
2
Asia
1
Baltic States
1
Europe, Eastern
1
Europe, Southern
1
Former communist countries
1
Ireland
1
Italy
1
Mediterranean Region
1
Nederland
1
North America
1
Pa⩳es de la Uni⯮ Europea
1
Southeast Asia
1
Spain
1
Turkey
1
Yugoslavia
1