Housing conditions and energy efficiency Households by burden of housing costs (mortgage or rent, heating, electricity, etc.) by income quintile per unit of consumption. Unidades: Horizontal percentages. ,A heavy burden,A reasonable burden,No burden,Not specified, Total,36,2,58,5,6,0,3, First quintile,48,5,45,4,5,7,0,4, Second quintile,43,9,50,4,5,3,0,4, Third quintile,38,57,2,4,5,0,3, Fourth quintile,30,7,64,2,4,9,0,2, Fifth quintile,20,4,71,9,7,5,0,1, Notas: Income per unit of consumption is obtained, for each household, by dividing total household income by the number of units of consumption. The distribution of persons is taken. Fuente: Instituto Nacional de Estadística