Level of studies	Duration of interval between 1st and 2nd birth (months)	Total
Total	Total	100
Total	From 0 to 7 months	1,09
Total	From 8 to 11 months	1,33
Total	From 12 to 23 months	19,63
Total	From 24 to 35 months	18,13
Total	From 36 to 47 months	17,85
Total	From 48 to 59 months	14,51
Total	60 and over	27,46
Illiterate	Total	100
Illiterate	From 0 to 7 months	..
Illiterate	From 8 to 11 months	6,15
Illiterate	From 12 to 23 months	28,26
Illiterate	From 24 to 35 months	28,48
Illiterate	From 36 to 47 months	22,61
Illiterate	From 48 to 59 months	11,41
Illiterate	60 and over	3,08
Without studies	Total	100
Without studies	From 0 to 7 months	..
Without studies	From 8 to 11 months	2,27
Without studies	From 12 to 23 months	32,61
Without studies	From 24 to 35 months	22,6
Without studies	From 36 to 47 months	17,67
Without studies	From 48 to 59 months	13,63
Without studies	60 and over	11,23
Primary education and second grade, GBE or first year of GCSE	Total	100
Primary education and second grade, GBE or first year of GCSE	From 0 to 7 months	0,78
Primary education and second grade, GBE or first year of GCSE	From 8 to 11 months	1,45
Primary education and second grade, GBE or first year of GCSE	From 12 to 23 months	18,27
Primary education and second grade, GBE or first year of GCSE	From 24 to 35 months	16,81
Primary education and second grade, GBE or first year of GCSE	From 36 to 47 months	17,66
Primary education and second grade, GBE or first year of GCSE	From 48 to 59 months	15,25
Primary education and second grade, GBE or first year of GCSE	60 and over	29,78
Secondary Education and Post-secondary non-higher	Total	100
Secondary Education and Post-secondary non-higher	From 0 to 7 months	0,41
Secondary Education and Post-secondary non-higher	From 8 to 11 months	0,63
Secondary Education and Post-secondary non-higher	From 12 to 23 months	17,47
Secondary Education and Post-secondary non-higher	From 24 to 35 months	19,41
Secondary Education and Post-secondary non-higher	From 36 to 47 months	17,65
Secondary Education and Post-secondary non-higher	From 48 to 59 months	14,36
Secondary Education and Post-secondary non-higher	60 and over	30,09
1º, 2º and intermediate technical-professional studies	Total	100
1º, 2º and intermediate technical-professional studies	From 0 to 7 months	2,77
1º, 2º and intermediate technical-professional studies	From 8 to 11 months	2,01
1º, 2º and intermediate technical-professional studies	From 12 to 23 months	17,78
1º, 2º and intermediate technical-professional studies	From 24 to 35 months	18
1º, 2º and intermediate technical-professional studies	From 36 to 47 months	18,91
1º, 2º and intermediate technical-professional studies	From 48 to 59 months	11,34
1º, 2º and intermediate technical-professional studies	60 and over	29,2
Higher level technical-professional studies	Total	100
Higher level technical-professional studies	From 0 to 7 months	..
Higher level technical-professional studies	From 8 to 11 months	..
Higher level technical-professional studies	From 12 to 23 months	19,94
Higher level technical-professional studies	From 24 to 35 months	..
Higher level technical-professional studies	From 36 to 47 months	80,06
Higher level technical-professional studies	From 48 to 59 months	..
Higher level technical-professional studies	60 and over	..
First year of tertiary education	Total	100
First year of tertiary education	From 0 to 7 months	3,91
First year of tertiary education	From 8 to 11 months	..
First year of tertiary education	From 12 to 23 months	21,52
First year of tertiary education	From 24 to 35 months	23,14
First year of tertiary education	From 36 to 47 months	17,52
First year of tertiary education	From 48 to 59 months	16,21
First year of tertiary education	60 and over	17,69
Tertiary education, university graduates and doctors	Total	100
Tertiary education, university graduates and doctors	From 0 to 7 months	0,65
Tertiary education, university graduates and doctors	From 8 to 11 months	0,22
Tertiary education, university graduates and doctors	From 12 to 23 months	30,08
Tertiary education, university graduates and doctors	From 24 to 35 months	21,66
Tertiary education, university graduates and doctors	From 36 to 47 months	17,37
Tertiary education, university graduates and doctors	From 48 to 59 months	12,95
Tertiary education, university graduates and doctors	60 and over	17,07