Main dwellings in buildings destined mainly for dwellings according to year of construction of the building (grouped) by type of heating . 28-Madrid

			TOTAL	Before 1900	1900-1920	1921-1940	1941-1950	1951-1960	1961-1970	1971-1980	1981-1990	1991-2001
TOTAL			1866869	42319	31986	69870	65538	183978	430793	518113	232027	292245
			23,63%	10,86%	15,75%	29,38%	30,21%	25,78%	24,42%	34,41%	18,78%	5,71%
With central heating
With individual heating			58,82%	42,74%	43,09%	39,45%	43,89%	47,69%	49,63%	52,20%	74,86%	90,42%
Without heating installation, but with individual room heaters			15,36%	39,60%	35,09%	27,04%	22,47%	23,37%	23,06%	11,65%	5,52%	3,34%
Without any means			2,18%	6,80%	6,07%	4,13%	3,43%	3,16%	2,89%	1,75%	0,85%	0,53%

Due to an error in assigning the labels, the data corresponding to individual heating and group heating have been modified with date 13/05/04. In the previous version both categories were interchanged between themselves.