Encuesta de Fecundidad Knowledge and use of contraceptions. Fem. between 15-49 Females between 15 and 49 years, with less of two live births knowledge of contraceptions age actual (years). Units: relative figures Total From 15 to 19 years old From 20 to 24 years old From 25 to 29 years old From 30 to 34 years old From 35 to 39 years old From 40 to 44 years old 45 to 49 years Total 100.00 14.01 20.82 22.80 18.25 11.00 7.99 5.13 Does not know any method 100.00 11.90 16.67 21.43 7.14 11.90 16.67 14.29 Knows at least one inefficient method, but any efficient method 100.00 .. 100.00 .. .. .. .. .. Knows at least one efficient method 100.00 14.03 20.84 22.82 18.36 10.99 7.91 5.05 Knows pill 100.00 20.72 25.03 22.80 14.80 8.08 5.40 3.15 Knows IUD 100.00 18.37 25.36 23.62 15.41 8.51 5.67 3.07 Knows diaphragm, cap, vaginal sponge 100.00 18.83 25.30 23.12 15.87 8.35 5.59 2.93 Knows abstinence 100.00 16.99 24.71 24.39 15.87 8.62 6.02 3.39 Knows condom 100.00 20.81 25.04 22.97 14.72 7.97 5.41 3.09 Knows cycle and basal body temperature 100.00 12.38 21.10 25.05 19.52 10.52 7.49 3.95 Knows withdrawal 100.00 15.97 24.48 24.79 16.49 9.00 6.04 3.24 Knows vaginal wash 100.00 17.20 23.59 22.23 17.26 9.69 6.30 3.73 Knows spermicides 100.00 18.33 25.44 23.52 16.02 8.19 5.55 2.95 Knows long breastfeeding 100.00 9.43 19.58 25.03 21.21 11.69 8.29 4.76 Knows injection 100.00 15.72 21.01 24.27 17.65 10.07 7.50 3.78 Knows the morning after pill 100.00 20.97 26.48 23.24 14.74 7.27 4.84 2.46 Knows sterilization 100.00 20.22 25.20 22.98 14.90 8.07 5.56 3.07 Knows vasectomy 100.00 19.61 25.45 23.25 15.03 8.03 5.53 3.10 Knows other methods 100.00 14.48 19.57 25.32 16.92 11.08 8.36 4.28 Notes: Source: National Statistics Institute