Encuesta de Fecundidad Characteristics marriages / couples and exposure to pregnancy risk. Women 15-49 years Females married sometime or with a partner level of studies age to 1st marriage or with a partner. Unidades: Absolute figures ;Total;Under 20 years old;From 20 to 24 years old;From 25 to 29 years old;From 30 to 34 years old;years old and over; Total;7.960.860;3.333.427;2.906.577;1.382.044;253.228;85.583; Illiterate;24.394;15.357;8.242;656;..;140; Without studies;177.163;72.451;83.084;16.242;3.627;1.759; Primary education and second grade, GBE or first year of GCSE;3.845.911;1.385.853;1.753.073;583.197;87.983;35.805; Secondary Education and Post-secondary non-higher;1.351.105;734.785;367.361;194.224;40.352;14.384; 1º, 2º and intermediate technical-professional studies;1.300.596;608.417;417.366;236.675;33.848;4.290; Higher level technical-professional studies;34.889;19.469;7.945;6.896;580;..; First year of tertiary education;500.603;181.859;151.207;135.090;24.631;7.816; Tertiary education, university graduates and doctors;726.200;315.238;118.300;209.064;62.208;21.390; Notas: Fuente: National Statistics Institute