Level of studies	Duration of protogenesic interval (months)	Total
Total	Total	100
Total	Negative	4,54
Total	From 0 to 7 months	15,84
Total	From 8 to 11 months	17,5
Total	From 12 to 23 months	28,25
Total	From 24 to 35 months	13,22
Total	From 36 to 47 months	8,06
Total	From 48 to 59 months	3,88
Total	60 and over	8,71
Illiterate	Total	100
Illiterate	Negative	3,01
Illiterate	From 0 to 7 months	18,37
Illiterate	From 8 to 11 months	18,55
Illiterate	From 12 to 23 months	39,09
Illiterate	From 24 to 35 months	9,79
Illiterate	From 36 to 47 months	11,19
Illiterate	From 48 to 59 months	..
Illiterate	60 and over	..
Without studies	Total	100
Without studies	Negative	6,34
Without studies	From 0 to 7 months	16,13
Without studies	From 8 to 11 months	27,88
Without studies	From 12 to 23 months	30,89
Without studies	From 24 to 35 months	7,29
Without studies	From 36 to 47 months	8,03
Without studies	From 48 to 59 months	0,43
Without studies	60 and over	3,03
Primary education and second grade, GBE or first year of GCSE	Total	100
Primary education and second grade, GBE or first year of GCSE	Negative	5,3
Primary education and second grade, GBE or first year of GCSE	From 0 to 7 months	17,95
Primary education and second grade, GBE or first year of GCSE	From 8 to 11 months	20,73
Primary education and second grade, GBE or first year of GCSE	From 12 to 23 months	28,18
Primary education and second grade, GBE or first year of GCSE	From 24 to 35 months	11,46
Primary education and second grade, GBE or first year of GCSE	From 36 to 47 months	7,06
Primary education and second grade, GBE or first year of GCSE	From 48 to 59 months	2,73
Primary education and second grade, GBE or first year of GCSE	60 and over	6,58
Secondary Education and Post-secondary non-higher	Total	100
Secondary Education and Post-secondary non-higher	Negative	2,98
Secondary Education and Post-secondary non-higher	From 0 to 7 months	14,82
Secondary Education and Post-secondary non-higher	From 8 to 11 months	9,38
Secondary Education and Post-secondary non-higher	From 12 to 23 months	31,69
Secondary Education and Post-secondary non-higher	From 24 to 35 months	14,08
Secondary Education and Post-secondary non-higher	From 36 to 47 months	8,49
Secondary Education and Post-secondary non-higher	From 48 to 59 months	5,61
Secondary Education and Post-secondary non-higher	60 and over	12,94
1º, 2º and intermediate technical-professional studies	Total	100
1º, 2º and intermediate technical-professional studies	Negative	4,64
1º, 2º and intermediate technical-professional studies	From 0 to 7 months	15,72
1º, 2º and intermediate technical-professional studies	From 8 to 11 months	13,48
1º, 2º and intermediate technical-professional studies	From 12 to 23 months	24,7
1º, 2º and intermediate technical-professional studies	From 24 to 35 months	16,59
1º, 2º and intermediate technical-professional studies	From 36 to 47 months	7,98
1º, 2º and intermediate technical-professional studies	From 48 to 59 months	5,82
1º, 2º and intermediate technical-professional studies	60 and over	11,09
Higher level technical-professional studies	Total	100
Higher level technical-professional studies	Negative	..
Higher level technical-professional studies	From 0 to 7 months	8,42
Higher level technical-professional studies	From 8 to 11 months	..
Higher level technical-professional studies	From 12 to 23 months	30,93
Higher level technical-professional studies	From 24 to 35 months	18,63
Higher level technical-professional studies	From 36 to 47 months	32,33
Higher level technical-professional studies	From 48 to 59 months	..
Higher level technical-professional studies	60 and over	9,69
First year of tertiary education	Total	100
First year of tertiary education	Negative	1,74
First year of tertiary education	From 0 to 7 months	9,17
First year of tertiary education	From 8 to 11 months	13,18
First year of tertiary education	From 12 to 23 months	31,21
First year of tertiary education	From 24 to 35 months	16,49
First year of tertiary education	From 36 to 47 months	11,2
First year of tertiary education	From 48 to 59 months	5,31
First year of tertiary education	60 and over	11,7
Tertiary education, university graduates and doctors	Total	100
Tertiary education, university graduates and doctors	Negative	2,12
Tertiary education, university graduates and doctors	From 0 to 7 months	5,16
Tertiary education, university graduates and doctors	From 8 to 11 months	11,25
Tertiary education, university graduates and doctors	From 12 to 23 months	25,76
Tertiary education, university graduates and doctors	From 24 to 35 months	20,09
Tertiary education, university graduates and doctors	From 36 to 47 months	12,88
Tertiary education, university graduates and doctors	From 48 to 59 months	7,48
Tertiary education, university graduates and doctors	60 and over	15,26