| Value | Category | Cases | |
|---|---|---|---|
| 0 | None | 88 |
1.1%
|
| 1 | Central heating | 16 |
0.2%
|
| 2 | Electricity | 985 |
12.7%
|
| 3 | Natural gas | 3369 |
43.3%
|
| 4 | Liquefied gas | 8 |
0.1%
|
| 5 | Oil and diesel | 1 |
0%
|
| 6 | Wood | 2867 |
36.9%
|
| 9 | Other | 442 |
5.7%
|