Population and Housing Censuses  
National Results
Buildings for housing by year of construction (aggregate) by no. of dwellings
Units: buildings

,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,
Total,9,730,999,793,401,366,416,431,216,481,269,863,630,1,052,009,1,495,132,1,360,191,1,417,202,1,470,533,
1,7,701,066,697,546,307,447,353,495,394,023,676,965,735,461,1,093,484,1,088,687,1,135,947,1,218,011,
2,651,034,45,136,25,879,35,329,38,859,68,120,91,475,119,740,98,937,85,021,42,538,
3,202,023,14,450,8,294,10,671,11,674,20,678,30,195,38,839,28,855,24,841,13,526,
4,140,755,8,657,5,068,6,216,7,261,14,569,19,937,24,462,18,916,20,433,15,236,
5 to 9,412,664,16,445,9,841,12,244,15,257,40,161,59,796,75,092,54,337,66,281,63,210,
10 to 19,398,959,9,044,7,503,9,283,10,399,31,472,70,821,80,616,44,153,59,203,76,465,
20 to 29,131,068,1,515,1,653,2,462,2,367,7,521,27,403,32,887,14,421,16,178,24,661,
30 to 39,47,853,386,441,905,892,2,524,8,924,14,771,5,979,4,980,8,051,
40 or over,45,577,222,290,611,537,1,620,7,997,15,241,5,906,4,318,8,835,
Notes:
Source: National statistics Institute