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