Housing conditions and energy efficiency Households by burden of housing costs (mortgage or rent, heating, electricity, etc.) by degree of urbanization. Unidades: Horizontal percentages. ;A heavy burden;A reasonable burden;No burden;Not specified; Total;36,2;58;5,6;0,3; Densely populated area;35,4;58,9;5,4;0,2; Intermediately populated area;39,1;55,3;5,2;0,4; Scarcely populated area;32,4;60,1;7,3;0,2; Notas: Fuente: Instituto Nacional de Estadística