Housing conditions and energy efficiency Households by burden of housing costs (mortgage or rent, heating, electricity, etc.) by tenure status of the housing. Unidades: Horizontal percentages. ;A heavy burden;A reasonable burden;No burden;Not specified; Total;36,2;58;5,6;0,3; Property;34,6;59,7;5,4;0,3; Lease at market price;45,6;50,1;4,2;0,1; Lease below market price;40,7;54,3;4,8;0,2; Free assignment;28,3;58,5;12,7;0,4; Notas: Fuente: Instituto Nacional de Estadística