Encuesta de Fecundidad Knowledge and use of contraceptions. Fem. between 15-49 Females between 15 and 49 years, use or have used contraceptions level of studies medical advice for use of contraceptions. Unidades: relative figures ,Total,Does not visit a medical center,Visits a public center,Visits a private center, Total,100,48,63,33,74,17,63, Illiterate,100,91,2,8,8,.., Without studies,100,53,17,38,22,8,61, Primary education and second grade, GBE or first year of GCSE,100,48,36,36,47,15,16, Secondary Education and Post-secondary non-higher,100,47,59,31,34,21,07, 1º, 2º and intermediate technical-professional studies,100,48,02,34,56,17,42, Higher level technical-professional studies,100,55,48,22,74,21,78, First year of tertiary education,100,45,89,31,39,22,72, Tertiary education, university graduates and doctors,100,52,07,25,43,22,5, Notas: Fuente: National Statistics Institute