Household Budget Survey (HBS) 
Distribution of households and persons (as a percentage) according to different classification variables 
Households and persons, according to the educational level of the main breadwinner 
Unidades: %
,Households,,,,,,,,,,People,,,,,,,,,,
,2015,2014,2013,2012,2011,2010,2009,2008,2007,2006,2015,2014,2013,2012,2011,2010,2009,2008,2007,2006,
        Total,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,
        Inferior a la primera etapa de Educación Secundaria,19,8,17,2,17,8,19,1,21,25,7,27,3,30,2,32,6,36,1,17,5,15,1,16,1,17,1,18,9,23,4,24,7,27,4,29,8,33,5,
        First stage of secondary education and the like,29,7,33,4,33,4,33,3,31,8,29,8,29,27,5,25,5,23,7,30,8,34,5,34,2,34,6,33,1,31,7,30,9,29,7,27,6,26,
        Second stage of secondary education and non-upper post-secondary education.,19,1,18,2,18,7,18,7,18,3,17,2,16,8,16,5,16,2,15,7,19,9,19,19,6,19,5,19,2,18,17,8,17,3,17,2,16,
        Enseñanzas de Formación Profesional de Grado Superior y similares,8,9,8,8,8,2,7,7,7,8,7,4,7,5,7,6,6,6,2,9,4,9,1,8,5,8,8,7,4,7,6,7,2,6,8,6,5,
        Grado (240 ETCS), Diplomatura, Ingeniería Técnica y similares,8,2,8,6,8,5,8,3,9,1,7,6,7,2,7,3,7,3,7,2,8,1,8,4,8,2,8,8,9,7,4,7,7,1,7,1,7,
        Grado (más de 240 ECTS), Licenciatura, Ingeniería, Máster, Doctorado,14,3,13,8,13,5,12,9,11,9,12,3,12,2,11,5,11,8,11,2,14,3,13,9,13,5,12,8,11,9,12,2,12,1,11,3,11,6,11,1,
Notas:
Until 2014, all university degree programmes were included in a single category ¿Degree (240 ETCS), Undergraduate degree...¿. As of 2015, the level of education follows the National Classification of Education CNED - 2014.
Illiterate persons are included in "Lower than first stage of Secondary education" category
Fuente: