National tables: studies, age and sex. Values Persons 18 to 49 years who have had homosexual relationships at some time in their life by studies Units: thousands of persons Total,645.3, Lower than secondary education,222.9, Secondary education,259.2, University,163.2, Notes: 1) Includes females that have only had sexual practices with females 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