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