Encuesta de Fecundidad Characteristics marriages / couples and exposure to pregnancy risk. Women 15-49 years Females between 15 and 49 years level of studies marital status. Unidades: Absolute figures Total Single women Married women Widows women Separated or divorced women Total 10.165.237 4.454.390 5.247.338 89.042 374.467 Illiterate 29.627 11.476 14.358 200 3.592 Without studies 191.792 20.859 156.306 5.856 8.771 Primary education and second grade, GBE or first year of GCSE 4.774.814 1.566.152 2.964.194 60.014 184.455 Secondary Education and Post-secondary non-higher 1.957.740 1.256.592 628.741 4.058 68.349 1º, 2º and intermediate technical-professional studies 1.615.916 796.423 753.194 10.699 55.601 Higher level technical-professional studies 38.349 28.475 9.875 .. .. First year of tertiary education 632.679 289.547 320.274 3.482 19.376 Tertiary education, university graduates and doctors 924.320 484.866 400.396 4.733 34.325 Notas: Fuente: National Statistics Institute