| Value | Category | Cases | |
|---|---|---|---|
| 0 | None | 76 |
1%
|
| 1 | Central heating | 17 |
0.2%
|
| 2 | Electricity | 626 |
8%
|
| 3 | Natural gas | 4038 |
51.3%
|
| 4 | Liquefiedgas | 35 |
0.4%
|
| 5 | Oil and diesel | 3 |
0%
|
| 6 | Wood | 2527 |
32.1%
|
| 9 | Other | 550 |
7%
|