| Valeur | Modalité | Cas | |
|---|---|---|---|
| 0 | Electricity | 3 |
0.2%
|
| 1 | Gas | 4 |
0.3%
|
| 2 | Charcoal | 822 |
52.2%
|
| 3 | Firewood | 133 |
8.4%
|
| 4 | Other | 11 |
0.7%
|
| Sysmiss | 603 |