The parameter ‘level of education’ can be subcategorised into four groups:
primary education;

  • lower secondary general and vocational education (vmbo);
  • secondary education (3 variants, i.e. mbo, havo, vwo);
  • higher education (higher vocational education, university).

Only the highest level of education is taken into account. If respondents are under the age of 25, the highest level of education within the household is taken into account.