| Main dwellings in buildings destined mainly for dwellings with some type of heating method according to year of construction of the building (grouped) by fuel used |
| TOTAL | Before 1900 | 1900-1920 | 1921-1940 | 1941-1950 | 1951-1960 | 1961-1970 | 1971-1980 | 1981-1990 | 1991-2001 | |||
| 100,00% | 100,00% | 100,00% | 100,00% | 100,00% | 100,00% | 100,00% | 100,00% | 100,00% | 100,00% | |||
| TOTAL | ||||||||||||
| Gas | 38,83% | 30,01% | 34,73% | 36,95% | 35,86% | 38,05% | 40,30% | 38,17% | 34,93% | 46,88% | ||
| Electricity | 37,00% | 32,66% | 37,21% | 36,92% | 37,95% | 40,02% | 41,03% | 37,35% | 35,63% | 32,25% | ||
| Petroleum or derivatives | 16,41% | 16,73% | 12,79% | 12,92% | 13,45% | 12,55% | 12,51% | 19,18% | 22,20% | 16,47% | ||
| Wood | 2,96% | 8,33% | 5,98% | 4,90% | 4,60% | 3,15% | 1,91% | 1,87% | 3,28% | 2,16% | ||
| Coal or derivatives | 4,41% | 11,74% | 8,75% | 7,87% | 7,67% | 5,79% | 3,85% | 3,03% | 3,61% | 1,97% | ||
| Others | 0,39% | 0,53% | 0,54% | 0,44% | 0,47% | 0,43% | 0,39% | 0,40% | 0,35% | 0,26% | ||