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