National tables. Lifestyles: nights out. Values Persons 18 to 49 years who have had sexual relationships at some time in their life by number of nights out in the last 12 months and sex Units: thousands of persons ,Both sexes,Males,Females, Total,19,524.0,9,967.8,9,556.2, At least 1 a month,12,828.4,7,164.9,5,663.5, Less than 1 a month,6,636.6,2,770.4,3,866.2, No data recorded,59.0,32.5,26.5, 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