| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 1 |
0.1%
|
| 2 | Wood | 192 |
12.2%
|
| 3 | Paraffin | 149 |
9.5%
|
| 4 | Electricity | 1214 |
77.4%
|
| 5 | Gas | 12 |
0.8%
|
| 6 | Coal | 0 |
0%
|
| 7 | Car battery | 0 |
0%
|
| 8 | Dung | 0 |
0%
|
| 9 | Other | 1 |
0.1%
|
| 99 | Unknown | 0 |
0%
|
| Sysmiss | 12 |