National tables. Lifestyles: nights out. Percentages Rate of persons who have had casual partners in the last year by sex and number of nights out in the last 12 months Units: percentages ;Total;At least 1 a month;Less than 1 a month; Both sexes;14.51;21.82;6.96; Males;18.28;25.82;9.03; Females;7.04;11.51;3.74; Notes: 1) Rate calculated with regards total population of 18 to 49 year olds 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