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: Relative 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,100,41,87,36,51,17,36,3,18,1,08, Illiterate,100,62,95,33,79,2,69,..,0,57, Without studies,100,40,9,46,9,9,17,2,05,0,99, Primary education and second grade, GBE or first year of GCSE,100,36,03,45,58,15,16,2,29,0,93, Secondary Education and Post-secondary non-higher,100,54,38,27,19,14,38,2,99,1,06, 1º, 2º and intermediate technical-professional studies,100,46,78,32,09,18,2,2,6,0,33, Higher level technical-professional studies,100,55,8,22,77,19,77,1,66,.., First year of tertiary education,100,36,33,30,2,26,99,4,92,1,56, Tertiary education, university graduates and doctors,100,43,41,16,29,28,79,8,57,2,95, Notas: Fuente: National Statistics Institute