National tables: studies, age and sex. Values
Persons 18 to 49 years who have had sexual relationships at some time    in their life by sex, parents' highest level of studies and initial age at  first relationship.
Units: thousands of persons

	Total	Under 16 years of age	From 16 to 17 years of age	From 18 to 19 years of age	20 years old or more	No data recorded	
Both sexes	
    Total	19,524.0	2,148.3	4,912.1	5,241.8	5,294.0	1,927.8	
    Lower than secondary education	14,367.9	1,535.6	3,499.9	3,883.6	3,848.5	1,600.3	
    Secondary education	2,585.8	300.1	698.2	704.4	753.7	129.5	
    University	2,059.3	233.0	574.1	518.4	613.9	120.0	
    No data recorded	510.9	79.7	139.9	135.4	77.9	78.0	
Males	
    Total	9,967.8	1,454.5	2,862.5	2,545.5	2,169.9	935.4	
    Lower than secondary education	7,290.0	1,038.9	2,005.4	1,863.0	1,598.4	784.3	
    Secondary education	1,250.9	212.6	383.7	334.7	276.6	43.4	
    University	1,121.0	141.6	370.6	280.8	259.8	68.2	
    No data recorded	305.9	61.4	102.7	67.1	35.1	39.5	
Females	
    Total	9,556.2	693.8	2,049.6	2,696.3	3,124.1	992.5	
    Lower than secondary education	7,077.9	496.7	1,494.5	2,020.6	2,250.2	816.0	
    Secondary education	1,334.9	87.5	314.5	369.7	477.1	86.2	
    University	938.3	91.3	203.5	237.6	354.1	51.8	
    No data recorded	205.0	18.2	37.2	68.4	42.8	38.5	
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