Encuesta de Fecundidad
Charac. married couples or couples and expos. risk of preg. Fem.15-49 years
Average duration 1st relation, single females with some relation,level  of studies and age actual (years).
Units: Average duration (years)

;Total;From 15 to 19 years old;From 20 to 24 years old;From 25 to 29 years old;From 30 to 34 years old;From 35 to 39 years old;From 40 to 44 years old;From 45 to 49 years old;
Total;0.9;0.1;0.2;0.9;2.4;5.4;3.6;3.0;
Illiterate;8.1;..;4.0;6.7;13.0;11.0;20.0;0.0;
Without studies;5.9;4.0;..;0.0;15.0;6.7;0.0;0.0;
Primary education and second grade, GBE or first year of GCSE;1.5;0.2;0.5;1.5;3.1;8.3;4.2;5.1;
Secondary Education and Post-secondary non-higher;0.5;0.0;0.1;0.6;2.3;6.3;2.6;0.0;
1º, 2º and intermediate technical-professional studies;0.6;0.1;0.1;1.0;2.3;1.9;7.6;0.0;
Higher level technical-professional studies;0.9;0.0;0.2;1.5;2.0;0.0;0.0;0.0;
First year of tertiary education;0.8;0.0;0.0;0.8;1.5;0.0;2.4;6.1;
Tertiary education, university graduates and doctors;0.5;..;0.0;0.1;1.7;2.0;1.9;0.6;
Notes:
Source: National Statistics Institute