National tables: studies, age and sex. Values Persons 18 to 49 years by sex, parents' highest level of studies and main source of sexual information. Units: thousands of persons ,Total,Old parents or relatives,Siblings or friends,Partner,Professionals,Various support,Nobody,No data recorded, Both sexes, Total,20,759.6,2,543.3,7,957.8,4,019.4,2,108.7,2,485.6,1,404.2,240.5, Lower than secondary education,15,169.1,1,615.7,5,767.2,3,132.5,1,551.8,1,793.3,1,140.9,167.8, Secondary education,2,789.3,456.1,1,049.1,492.1,283.7,383.8,108.5,16.0, University,2,267.1,415.9,978.4,275.5,214.6,273.6,73.5,35.7, No data recorded,534.1,55.7,163.1,119.3,58.6,34.9,81.3,21.0, Males, Total,10,532.1,1,095.9,4,559.1,1,555.1,1,028.0,1,380.7,761.5,151.8, Lower than secondary education,7,651.8,709.1,3,301.0,1,182.2,751.6,988.2,608.9,110.9, Secondary education,1,344.2,167.6,558.0,198.6,122.4,223.5,65.0,9.2, University,1,221.7,182.3,593.6,123.3,116.7,142.8,44.8,18.1, No data recorded,314.4,37.0,106.6,51.0,37.3,26.3,42.8,13.5, Females, Total,10,227.5,1,447.4,3,398.7,2,464.3,1,080.7,1,104.9,642.8,88.7, Lower than secondary education,7,517.3,906.6,2,466.2,1,950.3,800.2,805.1,532.0,56.8, Secondary education,1,445.1,288.5,491.1,293.5,161.3,160.3,43.5,6.8, University,1,045.4,233.6,384.8,152.1,97.9,130.8,28.8,17.5, No data recorded,219.7,18.7,56.6,68.3,21.3,8.7,38.5,7.5, 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