Household Budget Survey (HBS) 
Variation coefficient (VC) of total expenditure according to different classification variables 
VC of total expenditure by educational level of the main breadwinner. 
Unidades: %
	2015	2014	2013	2012	2011	2010	2009	2008	2007	2006	
        Total	0,8	0,8	0,8	0,8	0,8	0,8	0,8	0,8	0,8	0,9	
        Inferior a la primera etapa de Educación Secundaria	2,3	2,6	2,5	2,4	2,3	2,2	2,1	2	1,9	1,9	
        First stage of secondary education and the like	1,7	1,5	1,5	1,6	1,7	1,8	1,8	1,8	2	2,2	
        Second stage of secondary education and non-upper post-secondary education.	2,2	2,2	2,1	2,1	2,2	2,1	2,2	2,4	2,5	2,8	
        Enseñanzas de Formación Profesional de Grado Superior y similares	3,1	3,1	3,1	3,2	3,2	3,2	3,3	3,4	3,7	4	
        Grado (240 ETCS), Diplomatura, Ingeniería Técnica y similares	3,3	3,3	3,4	3,4	3,4	3,5	3,6	3,7	3,8	3,9	
        Grado (más de 240 ECTS), Licenciatura, Ingeniería, Máster, Doctorado	3,3	3,3	3,5	3,6	3,8	3,6	3,7	3,8	3,7	3,9	
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.
Due to a lack of representativeness, estimates cannot be provided for the cells without data (to points)
Illiterate persons are included in "Lower than first stage of Secondary education" category
Fuente: