Table 1.

Age and level of parents’ education.

	Mean age	Elementary and lower secondary school diploma	Upper secondary school diploma	University degree
Father	45.3	36.4% (95%CI: 31.5-41.2)	42.6% (95%CI: 38.0-47.1)	21.0% (95%CI: 15.7–26.4)
Mother	42.2	30.0% (95%CI: 25.0-35.0)	45.7% (95%CI: 41.3-50.1)	24.3% (95%CI: 19.1-29.6)