Encuesta de Fecundidad
Females who got married sometime, at least two children live birth.
Females married sometime, at least two children live birth.  duration of protogenesic interval   duration of interval between 1st and 2nd birth. 
Unidades: absolute figures

	Total	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	3.774.637	41.253	50.154	740.800	684.422	673.798	547.829	1.036.380	47,38	
Negative	172.392	3.515	1.647	25.397	29.253	21.456	24.837	66.287	57,21	
From 0 to 7 months	640.410	2.348	11.428	171.044	105.890	73.173	81.801	194.726	48,51	
From 8 to 11 months	803.670	7.301	9.276	176.393	133.313	169.676	117.697	190.013	45,85	
From 12 to 23 months	1.137.434	7.573	18.866	211.172	207.039	221.910	168.948	301.926	46,16	
From 24 to 35 months	451.429	6.906	..	74.396	97.405	70.271	67.144	135.306	47,74	
From 36 to 47 months	263.478	1.164	1.420	32.415	48.708	69.557	43.674	66.541	48,58	
From 48 to 59 months	88.622	1.919	3.634	14.811	21.456	8.855	12.688	25.259	45,98	
60 and over	217.201	10.528	3.883	35.172	41.358	38.899	31.040	56.322	46,71	
Notas:
Fuente: National Statistics Institute