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