| Value | Category | Cases | |
|---|---|---|---|
| 0 | None | 115 |
2.2%
|
| 1 | Central heating | 8 |
0.2%
|
| 2 | Electricity | 659 |
12.7%
|
| 3 | Natural gas | 2001 |
38.6%
|
| 4 | Liquefied gas | 1 |
0%
|
| 5 | Oil and diesel | 0 |
0%
|
| 6 | Wood | 2044 |
39.4%
|
| 9 | Other | 356 |
6.9%
|