| Value | Category | Cases | |
|---|---|---|---|
| 0 | None | 2226 |
61.7%
|
| 1 | Gas | 241 |
6.7%
|
| 2 | Electricity | 846 |
23.5%
|
| 3 | Wood | 275 |
7.6%
|
| 4 | Olive pulp | 2 |
0.1%
|
| 5 | Coal | 0 |
0%
|
| 6 | Other, specify | 13 |
0.4%
|
| Sysmiss | 4 |