Population and Housing Censuses National results Main dwellings according to combination of nationalities in the household by useful surface Units: main dwellings Total (useful surface) Less than 30m2 Between 30 and 45m2 Between 46 and 60m2 Between 61 and 75m2 Between 76 and 90m2 Between 91 and 105m2 Between 106 and 120m2 Between 121 and 150m2 Between 151 and 180m2 More than 180m2 Total 18,083,692 50,438 535,426 1,969,210 3,360,926 5,354,922 2,461,922 1,650,776 1,310,374 568,273 821,427 All members of the household have Spanish nationality 15,861,186 33,726 407,151 1,612,817 2,896,027 4,758,174 2,213,929 1,496,214 1,197,226 519,435 726,486 Some member of the household does not have Spanish nationality 2,222,507 16,712 128,274 356,393 464,899 596,748 247,993 154,562 113,148 48,837 94,942 Notes: Source: National Statistics Institute