| Value | Category | Cases | |
|---|---|---|---|
| 1 | Electricity | 234318 |
32.5%
|
| 2 | Gas | 8301 |
1.2%
|
| 3 | Wood | 190164 |
26.4%
|
| 4 | Coal | 154296 |
21.4%
|
| 5 | Dung | 131156 |
18.2%
|
| 6 | Other | 2720 |
0.4%
|
| Sysmiss | 3426 |