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: Absolute figures ,Total,With spouse,With stable partner in the household,With stable partner out of household,With occasional relations,Another situation, Total,10.165.237,5.247.338,386.866,1.617.623,419.345,2.494.064, Illiterate,29.627,14.358,6.243,..,1.488,7.537, Without studies,191.792,156.306,11.955,1.037,5.697,16.797, Primary education and second grade, GBE or first year of GCSE,4.774.814,2.964.194,193.459,415.884,120.109,1.081.167, Secondary Education and Post-secondary non-higher,1.957.740,628.741,63.131,487.940,119.017,658.911, 1º, 2º and intermediate technical-professional studies,1.615.916,753.194,55.264,377.772,78.513,351.173, Higher level technical-professional studies,38.349,9.875,5.709,18.949,..,3.817, First year of tertiary education,632.679,320.274,22.148,110.060,28.014,152.183, Tertiary education, university graduates and doctors,924.320,400.396,28.957,205.982,66.506,222.480, Notas: Fuente: National Statistics Institute