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: vertical 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 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Does not know any method 0.94 0.80 0.75 0.88 0.37 1.01 1.96 2.61 Knows at least one inefficient method, but any efficient method 0.02 .. 0.11 .. .. .. .. .. Knows at least one efficient method 99.04 99.20 99.14 99.12 99.63 98.99 98.04 97.39 Knows pill 99.28 98.56 99.82 99.08 99.75 99.48 99.04 99.03 Knows IUD 90.60 79.72 92.27 93.65 94.77 95.56 94.76 87.96 Knows diaphragm, cap, vaginal sponge 79.71 71.91 81.01 80.66 85.85 82.54 82.27 73.77 Knows abstinence 80.23 65.31 79.63 85.63 86.44 85.76 89.17 86.02 Knows condom 98.97 98.64 99.53 99.48 98.90 97.81 98.87 96.64 Knows cycle and basal body temperature 55.93 33.15 47.40 61.31 74.09 72.94 77.30 69.90 Knows withdrawal 80.84 61.86 79.48 87.69 90.49 90.22 90.10 82.71 Knows vaginal wash 58.57 48.24 55.48 56.98 68.63 70.37 68.15 69.12 Knows spermicides 67.04 58.87 68.49 68.99 72.90 68.09 68.73 62.60 Knows long breastfeeding 39.45 17.83 31.03 43.22 56.81 57.16 60.40 59.35 Knows injection 49.80 37.50 42.02 52.89 59.69 62.20 68.94 59.57 Knows the morning after pill 76.11 76.47 80.96 77.39 76.16 68.60 67.96 59.16 Knows sterilization 94.11 91.13 95.24 94.66 95.18 94.22 96.53 91.44 Knows vasectomy 92.77 87.13 94.84 94.37 94.64 92.36 94.79 90.83 Knows other methods 7.97 5.53 6.26 8.83 9.15 10.94 12.29 10.77 Notes: Source: National Statistics Institute