Encuesta de Fecundidad Characteristics marriages / couples and exposure to pregnancy risk. Women 15-49 years Single females who have had a partner, who 1st relation finished age actual (years) duration of the 1st relation (years). Unidades: Relative figures ;Total;Under 5 years old;From 5 to 9 years old;From 10 to 14 years old;From 15 to 19 years old;20 years old and over; Total;100;96,56;1,56;0,54;1,33;..; From 15 to 19 years old;100;100;..;..;..;..; From 20 to 24 years old;100;99,44;0,56;..;..;..; From 25 to 29 years old;100;99,5;0,5;..;..;..; From 30 to 34 years old;100;92,86;5,56;1,58;..;..; From 35 to 39 years old;100;81,6;..;2,32;16,08;..; From 40 to 44 years old;100;89,52;7,23;3,25;..;..; From 45 to 49 years old;100;89,14;10,86;..;..;..; Notas: Fuente: National Statistics Institute