National tables: age and sex. Values Persons who have had sexual relationships with new partners in the last year by age group and sex. Units: Thousands of persons ;Both sexes;Males;Females; Total;2,656.4;1,807.9;848.4; From 18 to 29 years of age;1,578.7;1,041.1;537.6; From 30 to 39 years of age;770.7;522.9;247.8; From 40 to 49 years of age;307.0;243.9;63.0; 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