| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 1 |
0.1%
|
| 2 | Wood | 270 |
17.2%
|
| 3 | Paraffin | 185 |
11.8%
|
| 4 | Electricity | 1102 |
70.2%
|
| 5 | Gas | 8 |
0.5%
|
| 6 | Coal | 2 |
0.1%
|
| 7 | Car battery | 0 |
0%
|
| 8 | Dung | 0 |
0%
|
| 9 | Other | 1 |
0.1%
|
| 99 | Unknown | 0 |
0%
|
| Sysmiss | 12 |