Housing conditions and energy efficiency Households by burden of housing costs (mortgage or rent, heating, electricity, etc.) by size of municipality. Unidades: Horizontal percentages. ,A heavy burden,A reasonable burden,No burden,Not specified, Total,36,2,58,5,6,0,3, Fewer than 10,000 inhabitants,35,58,3,6,5,0,3, Between 10,000 and 50,000 inhabitants,38,7,56,4,9,0,4, Between 50,000 and 100,000 inhabitants,35,5,58,4,5,8,0,3, Between 100,000 and 500,000 inhabitants,35,9,57,8,6,1,0,2, More than 500,000 inhabitants,34,6,60,4,4,9,0,1, Notas: Fuente: Instituto Nacional de Estadística