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: relative figures

;Total;None;One;Two;Three;Four;Five and more;
Total;100;60,56;9,32;18,99;8,64;1,32;1,16;
From 15 to 19 years old;100;100;..;..;..;..;..;
From 20 to 24 years old;100;100;..;..;..;..;..;
From 25 to 29 years old;100;95,2;4,8;..;..;..;..;
From 30 to 34 years old;100;51,23;48,77;..;..;..;..;
From 35 to 39 years old;100;22,98;15,23;33,5;19,65;8,64;..;
From 40 to 44 years old;100;33,93;25,06;27,89;13,11;..;..;
45 to 49 years;100;19,98;4,4;50,4;18,95;..;6,26;
Notas:
Fuente: National Statistics Institute