Encuesta de Fecundidad
Knowledge and use of contraceptions. Fem. between 15-49
Females between 15 and 49 years,   non knowledge of contraceptions  size of municipality of residence  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;
Up to 10,000 inhabitants;100;62,92;5,6;14,08;17,4;..;..;
From 10,001 to 50,000 inhabitants;100;56,57;11,34;23,44;..;4,59;4,06;
From 50,001 to 500,000 inhabitants;100;50,44;19,47;16,19;13,91;..;..;
More than 500,000 inhabitants;100;75,68;..;24,32;..;..;..;
Notas:
Fuente: National Statistics Institute