Housing conditions and energy efficiency Households by burden of housing costs (mortgage or rent, heating, electricity, etc.) by nationality of the reference person. Unidades: Horizontal percentages. A heavy burden A reasonable burden No burden Not specified Total 36,2 58 5,6 0,3 Spanish 35,8 58,5 5,5 0,3 Foreign (European Union) 35,9 56,2 7,6 0,2 Foreign (rest of the world) 42,8 50,3 6,6 0,4 Not specified 51,5 48,5 .. .. Notas: Fuente: Instituto Nacional de Estadística