Main dwellings in buildings destined mainly for dwellings according to year of construction of the building (grouped) by type of heating . 50-Zaragoza

			TOTAL	Before 1900	1900-1920	1921-1940	1941-1950	1951-1960	1961-1970	1971-1980	1981-1990	1991-2001
TOTAL			317504	15603	6959	10038	13553	35473	64719	70351	51240	49568
			29,34%	4,60%	8,33%	11,68%	14,20%	13,76%	23,99%	57,66%	34,77%	20,14%
With central heating
With individual heating			48,88%	41,54%	40,78%	45,92%	48,22%	47,53%	45,64%	30,27%	59,14%	74,12%
Without heating installation, but with individual room heaters			18,18%	44,25%	41,24%	34,45%	31,26%	32,68%	25,58%	10,12%	5,15%	4,72%
Without any means			3,60%	9,61%	9,64%	7,96%	6,33%	6,03%	4,78%	1,95%	0,94%	1,02%

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.