Encuesta de Fecundidad
Knowledge and use of contraceptions. Fem. between 15-49
Females between 15 and 49 years,   non knowledge of contraceptions  occupational history  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,
Previously worked  sometime,100,55,1,9,24,25,47,8,3,..,1,89,
Have never worked,100,69,35,9,45,8,55,9,2,3,44,..,
Notas:
Fuente: National Statistics Institute