National tables: age and sex. Percentages Persons 18 to 49 years by sex, age group and preferred source of sexual information. Units: percentages Total Old parents or relatives Siblings or friends Partner Professionals Various support Both sexes Total 100.00 53.05 12.65 5.09 25.74 3.47 From 18 to 29 years of age 100.00 48.38 17.82 4.73 25.34 3.73 From 30 to 39 years of age 100.00 53.97 11.44 5.50 26.17 2.92 From 40 to 49 years of age 100.00 57.94 7.48 5.08 25.73 3.77 Males Total 100.00 47.42 16.18 5.67 27.05 3.68 From 18 to 29 years of age 100.00 42.63 22.59 5.96 24.98 3.84 From 30 to 39 years of age 100.00 48.76 14.95 5.79 27.10 3.40 From 40 to 49 years of age 100.00 52.12 9.23 5.14 29.72 3.78 Females Total 100.00 58.78 9.06 4.51 24.40 3.25 From 18 to 29 years of age 100.00 54.40 12.82 3.44 25.73 3.62 From 30 to 39 years of age 100.00 59.23 7.89 5.22 25.23 2.43 From 40 to 49 years of age 100.00 63.70 5.74 5.02 21.79 3.75 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