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