Which of the following European countries was the first to introduce mandatory sex education in school?

Explanation

Not all European countries have obligatory sex education in school. The following countries do, however: Austria (1970), Belgium (1995), Czech Republic (1970), Denmark (1970), Estonia (1996), Finland (1970), France (1998), Germany (1968), Greece (1995), Hungary (1974), Iceland (1975), Ireland (2003), Latvia (1998), Luxembourg (1973), Netherlands (1993), Norway (1974), Portugal (1999), Slovakia (1996) and Sweden (1955).