National tables: studies, age and sex. Values Males 18 to 49 years who have had sexual relationships at some time in their life by parents' highest level of studies and use of a prostitute at some time in their life. Units: thousands of persons Total Yes No No data recorded Total 9,967.8 2,687.8 7,175.2 104.8 Lower than secondary education 7,290.0 1,988.1 5,224.4 77.5 Secondary education 1,250.9 327.5 916.3 7.1 University 1,121.0 293.6 814.0 13.5 No data recorded 305.9 78.6 220.5 6.8 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