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