National tables: age and sex. Values Persons 18 to 49 years that have had sexual relationships at some time in their life by age group and sex. Units: Thousands of persons ,Both sexes,Males,Females, Total,19,524.0,9,967.8,9,556.2, From 18 to 29 years of age,6,746.8,3,516.4,3,230.4, From 30 to 39 years of age,6,851.4,3,493.0,3,358.4, From 40 to 49 years of age,5,925.8,2,958.3,2,967.4, 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