Encuesta de Fecundidad
Knowledge and use of contraceptions. Fem. between 15-49
Females between 15 and 49 years,   non knowledge of contraceptions  level of studies  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;
Illiterate;100;73,94;..;..;..;..;26,06;
Without studies;100;..;..;52,05;..;47,95;..;
Primary education and second grade, GBE or first year of GCSE;100;60,53;11,56;19,5;8,42;..;..;
Secondary Education and Post-secondary non-higher;100;77,09;6,11;1,68;15,11;..;..;
1º, 2º and intermediate technical-professional studies;100;66,73;..;33,27;..;..;..;
Higher level technical-professional studies;..;..;..;..;..;..;..;
First year of tertiary education;100;49;18,66;..;32,34;..;..;
Tertiary education, university graduates and doctors;..;..;..;..;..;..;..;
Notas:
Fuente: National Statistics Institute