National tables: studies, age and sex. Percentages Persons 18 to 49 years who have had sexual relationships at some time in their life by sex, parents' highest level of studies and use of condom in first sexual relationship. Units: percentages Total Yes No Both sexes Total 100.00 56.73 43.27 Lower than secondary education 100.00 54.96 45.04 Secondary education 100.00 62.61 37.39 University 100.00 61.60 38.40 Males Total 100.00 55.49 44.51 Lower than secondary education 100.00 54.35 45.65 Secondary education 100.00 56.10 43.90 University 100.00 62.19 37.81 Females Total 100.00 58.00 42.00 Lower than secondary education 100.00 55.58 44.42 Secondary education 100.00 68.82 31.18 University 100.00 60.90 39.10 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