Encuesta de Fecundidad Knowledge and use of contraceptions. Fem. between 15-49 Females between 15 and 49 years, non knowledge of contraceptions age actual (years) number of live births. Unidades: absolute figures Total None One Two Three Four Five and more Average Total 91.110 55.175 8.496 17.304 7.874 1.201 1.060 0,84 From 15 to 19 years old 15.661 15.661 .. .. .. .. .. 0 From 20 to 24 years old 16.363 16.363 .. .. .. .. .. 0 From 25 to 29 years old 10.578 10.069 508 .. .. .. .. 0,05 From 30 to 34 years old 2.931 1.502 1.430 .. .. .. .. 0,49 From 35 to 39 years old 13.891 3.192 2.115 4.654 2.730 1.201 .. 1,76 From 40 to 44 years old 14.750 5.005 3.697 4.114 1.934 .. .. 1,2 45 to 49 years 16.935 3.383 746 8.536 3.210 .. 1.060 1,93 Notas: Fuente: National Statistics Institute