| Value | Category | Cases | |
|---|---|---|---|
| 0 | No/ None | 5304 |
53.4%
|
| 1 | gas | 665 |
6.7%
|
| 2 | Electricity | 2674 |
26.9%
|
| 3 | Wood | 1211 |
12.2%
|
| 4 | Olive cake | 21 |
0.2%
|
| 5 | Other | 49 |
0.5%
|
| Sysmiss | 2 |