| Total | Central water heating system | | 42.0 | 41.2 | 41.2 | 42.7 | 41.1 | 43.0 | 43.6 | 45.2 |
| Local water heating system | | 29.9 | 32.8 | 34.2 | 34.4 | 36.8 | 37.6 | 37.9 | 38.9 |
| No hot water available | | 28.1 | 26.0 | 24.6 | 22.9 | 22.1 | 19.4 | 18.5 | 15.9 |
| Single person aged 60 and over | Central water heating system | | 36.9 | 35.5 | 36.4 | 37.9 | 39.5 | 40.6 | 45.5 | 42.7 |
| Local water heating system | | 20.5 | 21.8 | 23.4 | 23.4 | 27.1 | 31.6 | 28.6 | 31.7 |
| No hot water available | | 42.6 | 42.7 | 40.2 | 38.7 | 33.4 | 27.8 | 25.9 | 25.6 |
| Single person aged under 60 | Central water heating system | | 45.0 | 40.5 | 41.2 | 50.6 | 44.2 | 51.9 | 48.2 | 54.1 |
| Local water heating system | | 26.1 | 26.5 | 28.4 | 22.2 | 25.6 | 24.5 | 27.0 | 27.0 |
| No hot water available | | 28.9 | 33.0 | 30.4 | 27.2 | 30.2 | 23.6 | 24.8 | 18.9 |
| Couple aged 60 and over without children | Central water heating system | | 37.7 | 36.4 | 37.6 | 37.0 | 36.0 | 35.0 | 36.7 | 39.5 |
| Local water heating system | | 30.1 | 33.1 | 33.7 | 33.0 | 39.8 | 43.7 | 39.2 | 39.8 |
| No hot water available | | 32.2 | 30.5 | 28.7 | 30.0 | 24.2 | 21.3 | 24.1 | 20.7 |
| Couple without children, at least one partner is aged under 60 | Central water heating system | | 43.1 | 41.8 | 41.6 | 44.7 | 45.0 | 42.1 | 47.6 | 45.1 |
| Local water heating system | | 32.8 | 36.8 | 39.2 | 40.5 | 39.5 | 43.0 | 39.2 | 43.7 |
| No hot water available | | 24.1 | 21.4 | 19.2 | 14.8 | 15.5 | 14.8 | 13.1 | 11.1 |
| Adult and child(ren) | Central water heating system | | 49.6 | 48.3 | 45.9 | 50.4 | 55.5 | 54.3 | 51.9 | 50.6 |
| Local water heating system | | 27.1 | 26.9 | 34.1 | 31.2 | 26.7 | 32.5 | 38.7 | 38.3 |
| No hot water available | | 23.3 | 24.8 | 20.0 | 18.4 | 17.8 | .. | .. | .. |
| Couple with one child | Central water heating system | | 50.4 | 52.3 | 50.6 | 47.1 | 42.5 | 53.1 | 51.3 | 57.6 |
| Local water heating system | | 35.1 | 36.5 | 36.0 | 42.3 | 50.0 | 38.9 | 40.4 | 37.9 |
| No hot water available | | 14.5 | 11.2 | 13.4 | 10.6 | 7.5 | 8.0 | 8.3 | .. |
| Couple with two children | Central water heating system | | 34.9 | 38.0 | 42.5 | 37.7 | 42.6 | 36.2 | 39.2 | 36.8 |
| Local water heating system | | 46.0 | 47.1 | 45.9 | 52.7 | 46.7 | 53.9 | 53.4 | 55.3 |
| No hot water available | | 19.1 | 14.9 | 11.6 | 9.6 | 10.7 | 9.9 | .. | .. |
| Couple with three or more children | Central water heating system | | 20.3 | 27.8 | 22.6 | .. | .. | .. | .. | .. |
| Local water heating system | | 47.5 | 44.7 | 43.4 | 54.2 | 67.7 | 52.1 | 64.7 | 74.2 |
| No hot water available | | 32.2 | 27.5 | 34.0 | .. | .. | 24.2 | .. | .. |
| Couple with minor and adult children | Central water heating system | | 41.8 | 42.2 | 38.0 | 30.3 | 33.6 | 34.9 | 30.3 | 35.2 |
| Local water heating system | | 38.5 | 41.1 | 44.6 | 51.8 | 49.1 | 50.4 | 57.1 | 56.3 |
| No hot water available | | 19.7 | 16.7 | 17.4 | 17.9 | 17.3 | 14.8 | 12.7 | 8.5 |
| Household consisting of two generations | Central water heating system | | 45.5 | 43.6 | 44.2 | 46.9 | 43.4 | 43.6 | 43.5 | 45.5 |
| Local water heating system | | 28.6 | 36.5 | 36.4 | 34.5 | 37.5 | 37.5 | 38.2 | 40.1 |
| No hot water available | | 25.9 | 19.9 | 19.4 | 18.6 | 19.1 | 19.0 | 18.3 | 14.4 |
| Other household | Central water heating system | | 39.5 | 43.0 | 41.7 | 43.1 | 36.5 | 41.2 | 38.4 | 41.0 |
| Local water heating system | | 26.8 | 32.1 | 34.0 | 36.1 | 39.9 | 38.0 | 44.1 | 41.2 |
| No hot water available | | 33.7 | 24.9 | 24.3 | 20.8 | 23.6 | 20.8 | 17.5 | 17.8 |