Encuesta de Fecundidad
Females who got married sometime with any child live birth
Fem., 15-49 years, married sometime, at least one child live birth.  level of studies  duration of protogenesic interval. 
Unidades: absolute figures

	Total	Negative	From 0 to 7 months	From 8 to 11 months	From 12 to 23 months	From 24 to 35 months	From 36 to 47 months	From 48 to 59 months	60 and over	Average	
Total	5.184.346	235.280	821.233	907.262	1.464.503	685.365	418.092	201.301	451.311	22,93	
Illiterate	17.859	538	3.280	3.313	6.981	1.749	1.999	..	..	11,26	
Without studies	166.943	10.579	26.923	46.537	51.563	12.168	13.405	712	5.056	14,52	
Primary education and second grade, GBE or first year of GCSE	3.009.921	159.624	540.209	624.080	848.267	344.895	212.649	82.187	198.010	18,99	
Secondary Education and Post-secondary non-higher	616.559	18.398	91.375	57.820	195.404	86.783	52.359	34.609	79.812	29,11	
1º, 2º and intermediate technical-professional studies	725.685	33.653	114.069	97.793	179.208	120.378	57.891	42.246	80.447	27,79	
Higher level technical-professional studies	6.799	..	573	..	2.103	1.267	2.198	..	659	30,93	
First year of tertiary education	292.790	5.105	26.854	38.594	91.393	48.268	32.784	15.533	34.258	29,9	
Tertiary education, university graduates and doctors	347.790	7.383	17.950	39.125	89.583	69.858	44.808	26.014	53.069	34,48	
Notas:
Fuente: National Statistics Institute