National tables. Lifestyles: nights out. Values Persons 18 to 49 years who have had sexual relationships at some time in their life by sex, number of nights out in the last 12 months and initial age at first relationship Units: thousands of persons Total Under 16 years of age From 16 to 17 years of age From 18 to 19 years of age 20 years old or above No data recorded Both sexes Total 19,524.0 2,148.3 4,912.1 5,241.8 5,294.0 1,927.8 At least 1 a month 12,828.4 1,513.5 3,479.9 3,497.3 3,281.1 1,056.6 Less than 1 a month 6,636.6 626.1 1,418.9 1,733.3 2,001.6 856.7 No data recorded 59.0 8.7 13.3 11.1 11.3 14.6 Males Total 9,967.8 1,454.5 2,862.5 2,545.5 2,169.9 935.4 At least 1 a month 7,164.9 1,095.8 2,174.6 1,870.1 1,465.0 559.3 Less than 1 a month 2,770.4 355.1 676.6 668.3 701.3 369.2 No data recorded 32.5 3.6 11.3 7.1 3.7 6.8 Females Total 9,556.2 693.8 2,049.6 2,696.3 3,124.1 992.5 At least 1 a month 5,663.5 417.6 1,305.3 1,627.2 1,816.1 497.2 Less than 1 a month 3,866.2 271.0 742.3 1,065.1 1,300.4 487.5 No data recorded 26.5 5.2 2.0 4.0 7.6 7.8 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