National tables: studies, age and sex. Values Persons who have had sexual rel. with casual partners in the last year by sex, age group and studies. Units: thousands of persons Total Lower than secondary education Secondary education University Both sexes Total 3,006.5 1,232.8 1,193.5 580.3 From 18 to 29 years of age 1,556.8 598.0 694.2 264.6 From 30 to 39 years of age 919.9 370.1 343.9 205.8 From 40 to 49 years of age 529.9 264.6 155.4 109.8 Males Total 2,298.2 991.3 900.2 406.7 From 18 to 29 years of age 1,149.1 472.6 512.8 163.7 From 30 to 39 years of age 742.1 317.4 264.9 159.9 From 40 to 49 years of age 406.9 201.4 122.5 83.1 Females Total 708.4 241.5 293.3 173.6 From 18 to 29 years of age 407.7 125.4 181.4 100.9 From 30 to 39 years of age 177.8 52.8 79.0 46.0 From 40 to 49 years of age 122.9 63.3 32.9 26.7 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