Encuesta de Fecundidad Characteristics marriages / couples and exposure to pregnancy risk. Women 15-49 years Females between 15 and 49 years level of studies cohabitation situation. Unidades: Relative figures ,Total,With spouse,With stable partner in the household,With stable partner out of household,With occasional relations,Another situation, Total,100,51,62,3,81,15,91,4,13,24,54, Illiterate,100,48,46,21,07,..,5,02,25,44, Without studies,100,81,5,6,23,0,54,2,97,8,76, Primary education and second grade, GBE or first year of GCSE,100,62,08,4,05,8,71,2,52,22,64, Secondary Education and Post-secondary non-higher,100,32,12,3,22,24,92,6,08,33,66, 1º, 2º and intermediate technical-professional studies,100,46,61,3,42,23,38,4,86,21,73, Higher level technical-professional studies,100,25,75,14,89,49,41,..,9,95, First year of tertiary education,100,50,62,3,5,17,4,4,43,24,05, Tertiary education, university graduates and doctors,100,43,32,3,13,22,28,7,2,24,07, Notas: Fuente: National Statistics Institute