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. Units: relative figures ,Total,Does not visit a medical center,Visits a public center,Visits a private center, Total,100.00,48.63,33.74,17.63, Illiterate,100.00,91.20,8.80,.., Without studies,100.00,53.17,38.22,8.61, Primary education and second grade, GBE or first year of GCSE,100.00,48.36,36.47,15.16, Secondary Education and Post-secondary non-higher,100.00,47.59,31.34,21.07, 1º, 2º and intermediate technical-professional studies,100.00,48.02,34.56,17.42, Higher level technical-professional studies,100.00,55.48,22.74,21.78, First year of tertiary education,100.00,45.89,31.39,22.72, Tertiary education, university graduates and doctors,100.00,52.07,25.43,22.50, Notes: Source: National Statistics Institute