32 countries

The 32 countries participating in the European Census include the 28 member states of the European Union (EU) - Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Poland, Portugal, Romania, Slovenia, Slovakia, Spain, Sweden and the United Kingdom -
and the four countries of the European Free Trade Association (EFTA)- Iceland, Liechtenstein, Norway and Switzerland.