Encuesta de Fecundidad Knowledge and use of contraceptions. Fem. between 15-49 Females between 15 and 49 years knowledge of contraceptions level of studies. Units: relative figures Total Illiterate Without studies Primary education and second grade, GBE or first year of GCSE Secondary Education and Post-secondary non-higher 1º, 2º and intermediate technical-professional studies Higher level technical-professional studies First year of tertiary education Tertiary education, university graduates and doctors Total 100.00 0.39 2.08 46.75 17.64 15.63 0.40 7.37 9.74 Does not know any method 100.00 9.37 3.12 54.69 10.94 14.06 .. 7.81 .. Knows at least one inefficient method, but any efficient method 100.00 .. .. 50.00 50.00 .. .. .. .. Knows at least one efficient method 100.00 0.31 2.07 46.69 17.69 15.64 0.40 7.37 9.83 Knows pill 100.00 0.19 1.80 46.55 19.52 16.03 0.38 6.28 9.25 Knows IUD 100.00 0.09 1.43 45.13 20.04 16.39 0.42 6.72 9.78 Knows diaphragm, cap, vaginal sponge 100.00 0.03 0.92 41.86 21.67 16.87 0.37 7.47 10.81 Knows abstinence 100.00 0.16 1.41 42.33 21.19 16.44 0.38 7.19 10.89 Knows condom 100.00 0.22 1.85 46.49 19.51 15.97 0.39 6.28 9.29 Knows cycle and basal body temperature 100.00 0.01 0.71 38.21 21.52 17.24 0.44 9.00 12.86 Knows withdrawal 100.00 0.16 1.56 43.16 20.30 16.72 0.39 7.08 10.63 Knows vaginal wash 100.00 0.04 0.85 39.83 20.78 17.49 0.30 8.46 12.23 Knows spermicides 100.00 0.04 0.68 37.98 22.64 17.98 0.38 8.28 12.03 Knows long breastfeeding 100.00 0.16 1.22 40.53 18.88 17.68 0.41 8.76 12.37 Knows injection 100.00 0.07 1.30 44.10 18.55 16.90 0.39 8.11 10.59 Knows the morning after pill 100.00 0.05 0.76 38.73 22.72 17.73 0.37 7.80 11.85 Knows sterilization 100.00 0.15 1.59 45.93 19.65 16.25 0.38 6.50 9.55 Knows vasectomy 100.00 0.12 1.52 45.61 19.94 16.29 0.38 6.56 9.58 Knows other methods 100.00 0.07 0.71 35.00 19.18 18.59 0.19 10.96 15.29 Notes: Source: National Statistics Institute