Encuesta de Fecundidad Knowledge and use of contraceptions. Fem. between 15-49 Females between 15 and 49 years, non knowledge of contraceptions level of studies number of live births. Unidades: absolute figures ,Total,None,One,Two,Three,Four,Five and more,Average, Total,91.110,55.175,8.496,17.304,7.874,1.201,1.060,0,84, Illiterate,4.069,3.008,..,..,..,..,1.060,1,3, Without studies,2.504,..,..,1.303,..,1.201,..,2,96, Primary education and second grade, GBE or first year of GCSE,61.124,36.996,7.066,11.918,5.144,..,..,0,76, Secondary Education and Post-secondary non-higher,5.594,4.313,342,94,845,..,..,0,55, 1º, 2º and intermediate technical-professional studies,11.991,8.002,..,3.989,..,..,..,0,67, Higher level technical-professional studies,..,..,..,..,..,..,..,.., First year of tertiary education,5.828,2.856,1.088,..,1.884,..,..,1,16, Tertiary education, university graduates and doctors,..,..,..,..,..,..,..,.., Notas: Fuente: National Statistics Institute