| Value | Category | Cases | |
|---|---|---|---|
| 1 | Gas | 1533 |
18.6%
|
| 2 | Kerosene | 89 |
1.1%
|
| 3 | Electricity | 2807 |
34%
|
| 4 | Wood | 1942 |
23.6%
|
| 5 | Diesel | 12 |
0.1%
|
| 6 | Coal | 176 |
2.1%
|
| 7 | Other | 37 |
0.4%
|
| 8 | None | 1641 |
19.9%
|
| Sysmiss | 7 |