Several countries (Armenia, Azerbaijan, Belgium, Cyprus, Czech Republic, Estonia, Malta, Spain) had experienced only one referendum at the time their replies to the questionnaire were written.  Others had held only two (Austria, Finland, Luxembourg – in 1919 and 1937 -, Norway, Poland, Portugal, “the former Yugoslav Republic of Macedonia”, Turkey), three (Latvia), or four (Hungary). Six had taken place in Sweden, Lithuania (since 1992) and Greece (during transition periods) and nine in France (since 1958).