Encuesta de Fecundidad
Single females with stable partner sometime, with any child live birth
Single Females, with stable partner sometime, with any child live birth  level of studies  interval between 1st union and 1st live birth . 
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	224.872	12.637	12.538	16.378	43.738	35.122	24.402	18.876	61.182	41,89	
Illiterate	6.243	..	..	..	3.576	1.984	118	565	..	25,82	
Without studies	6.229	..	..	..	604	1.226	3.787	..	613	43,89	
Primary education and second grade, GBE or first year of GCSE	130.839	10.459	7.329	10.942	29.934	27.125	9.961	11.824	23.264	30,06	
Secondary Education and Post-secondary non-higher	32.125	2.178	1.709	3.753	4.348	1.519	4.745	4.758	9.116	46,24	
1º, 2º and intermediate technical-professional studies	27.820	..	2.820	772	3.916	2.451	4.952	..	12.909	59,46	
Higher level technical-professional studies	357	..	..	..	..	..	..	..	357	72	
First year of tertiary education	4.758	..	..	..	..	..	839	922	2.997	114,01	
Tertiary education, university graduates and doctors	16.501	..	680	911	1.360	817	..	806	11.926	81,48	
Notas:
Fuente: National Statistics Institute