| Value | Category | Cases | |
|---|---|---|---|
| 6 | Coal | 5471 |
48.3%
|
| 7 | Charcoal | 26 |
0.2%
|
| 8 | Wood | 3162 |
27.9%
|
| 10 | Animal dung | 2595 |
22.9%
|
| 11 | Sawdust | 42 |
0.4%
|
| 96 | Other | 29 |
0.3%
|
| Sysmiss | 4175 |