Encuesta de Fecundidad Knowledge and use of contraceptions. Fem. between 15-49 Females between 15 and 49 years level of studies contraceptive practices. Unidades: absolute figures ,Total,Never has used method,Has used before, but not currently,Currently use one efficient method,Currently use one inefficient method, Total,10.165.237,2.789.179,1.654.807,5.404.945,316.307, Illiterate,29.627,8.526,6.713,7.650,6.738, Without studies,191.792,44.913,35.052,93.915,17.913, Primary education and second grade, GBE or first year of GCSE,4.774.814,1.316.306,785.405,2.475.390,197.713, Secondary Education and Post-secondary non-higher,1.957.740,692.578,253.035,990.870,21.256, 1º, 2º and intermediate technical-professional studies,1.615.916,372.085,271.688,921.966,50.176, Higher level technical-professional studies,38.349,10.049,1.850,26.450,.., First year of tertiary education,632.679,159.194,112.113,350.118,11.255, Tertiary education, university graduates and doctors,924.320,185.529,188.949,538.586,11.257, Notas: Fuente: National Statistics Institute