| Value | Category | Cases | |
|---|---|---|---|
| 1 | paraffin | 9395 |
87.8%
|
| 2 | gas | 75 |
0.7%
|
| 3 | electricity | 626 |
5.9%
|
| 4 | other | 596 |
5.6%
|
| 9 | no response | 5 |
0%
|
| Sysmiss | 1 |