| Value | Category | Cases | |
|---|---|---|---|
| 1 | Propane | 423 |
27.6%
|
| 2 | Kerosene | 13 |
0.8%
|
| 3 | Coal | 916 |
59.9%
|
| 4 | wood | 169 |
11%
|
| 98 | Do not know | 9 |
0.6%
|