Population and Housing Censuses  
National results
Dwellings according to type of dwelling and construction year (added) of the building
Units: dwellings

;Total;Before 1900;From 1900 to 1920;From 1921 to 1940;From 1941 to 1950;From 1951 to 1960;From 1961 to 1970;From 1971 to 1980;From 1981 to 1990;From 1991 to 2001;From 2002 to 2011;No data recorded;
2.1 Total main dwellings;18,083,692;597,453;358,404;490,702;546,733;1,315,009;2,703,119;3,720,472;2,242,375;2,598,718;2,955,554;555,155;
2.21 Secondary dwellings;3,681,565;207,956;102,711;108,352;124,624;218,147;401,816;747,628;599,071;480,647;625,945;64,667;
2.22 Empty dwellings;3,443,365;236,471;129,586;155,761;159,485;300,949;468,263;543,252;295,750;316,828;767,925;69,095;
Notes:
Source: National Statistics Institute