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