National tables: studies, age and sex. Values
Persons 18 to 49 years by sex, parents' highest level of studies   and preferred source of sexual information.
Units: thousands of persons

	Total	Old parents or relatives	Siblings or friends	Partner	Professionals	Various support	No data recorded	
Both sexes	
    Total	20,759.6	10,771.8	2,568.9	1,033.9	5,225.5	703.6	456.0	
    Lower than secondary education	15,169.1	8,044.9	1,796.3	780.6	3,779.2	446.1	321.9	
    Secondary education	2,789.3	1,345.1	360.0	139.0	747.8	142.1	55.3	
    University	2,267.1	1,083.8	335.7	77.7	614.6	90.4	64.9	
    No data recorded	534.1	297.9	76.8	36.6	83.8	25.0	13.9	
Males	
    Total	10,532.1	4,854.9	1,656.9	580.2	2,769.8	376.4	293.9	
    Lower than secondary education	7,651.8	3,560.2	1,171.6	428.4	2,041.3	258.8	191.4	
    Secondary education	1,344.2	615.3	191.1	73.6	367.1	55.4	41.8	
    University	1,221.7	521.2	232.9	56.3	313.9	49.2	48.2	
    No data recorded	314.4	158.2	61.3	21.9	47.6	13.0	12.4	
Females	
    Total	10,227.5	5,916.9	911.9	453.7	2,455.7	327.2	162.0	
    Lower than secondary education	7,517.3	4,484.8	624.7	352.2	1,737.9	187.3	130.4	
    Secondary education	1,445.1	729.8	168.8	65.4	380.8	86.8	13.5	
    University	1,045.4	562.6	102.8	21.4	300.7	41.2	16.7	
    No data recorded	219.7	139.7	15.6	14.7	36.3	12.0	1.4	
Notes:
Data corresponding to cells with less than 45,000 persons must be used with  caution, because they may be affected by high sample errors.
Source: National Statistics Institute