Region
Asia
3
Budapest
1
Bulgaria
1
China
1
Communist countries
6
Croatia
1
Czech Republic
1
Developing countries
2
Europe
7
Europe, Central
3
Europe, Eastern
23
European Union countries
3
Former Soviet republics
8
Former communist countries
83
Germany (East)
1
Hungary
1
Kazakhstan
1
Latvia
1
Poland
1
Romania
1
Russia
3
Russia (Federation)
2
Slovakia
1
United States
4