Tables by Autonomous Communities. Values Age at first sexual relationship in persons of 18 to 49 years by Autonomous Community, sex and type of indicator. Units: ? ,Both sexes,,Males,,Females,, ,Average,Standard deviation,Average,Standard deviation,Average,Standard deviation, Total,18.6,3.3,18.1,3.3,19.1,3.2, Andalucía,18.6,3.4,18.1,3.5,19.1,3.2, Aragón,19.0,3.3,18.5,3.3,19.5,3.2, Asturias (Principado de),18.7,3.2,18.5,3.5,18.9,2.8, Balears (Illes),17.8,3.0,17.3,2.8,18.4,3.2, Canarias,17.7,2.9,17.3,2.9,18.2,2.7, Cantabria,18.5,2.9,18.1,2.7,18.9,3.0, Castilla y León,18.6,3.1,18.2,3.3,19.1,2.9, Castilla-La Mancha,19.2,3.2,18.9,3.3,19.5,3.1, Cataluña,18.4,3.2,17.9,3.3,18.9,3.0, Comunidad Valenciana,18.6,3.2,18.1,3.2,19.1,3.1, Extremadura,18.6,3.4,18.0,3.5,19.2,3.2, Galicia,18.2,2.9,17.6,2.9,18.8,2.8, Madrid (Comunidad de),18.8,3.5,18.2,3.3,19.5,3.5, Murcia (Región de),18.4,3.3,18.0,3.1,18.9,3.5, Navarra (Comunidad Foral de),18.9,3.2,18.2,2.9,19.7,3.3, País Vasco,19.2,3.4,18.9,3.7,19.5,3.0, Rioja (La),19.4,3.9,18.8,3.6,20.1,4.0, Ceuta y Melilla,18.7,3.5,17.9,2.9,19.6,3.9, 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