| Value | Category | Cases | |
|---|---|---|---|
| 1 | Electricity | 6 |
1.1%
|
| 2 | Paraffin | 1 |
0.2%
|
| 3 | Wood | 365 |
68.5%
|
| 4 | Coal | 2 |
0.4%
|
| 5 | Charcoal | 149 |
28%
|
| 6 | Sawdust | 1 |
0.2%
|
| 7 | Gas | 9 |
1.7%
|
| 8 | Other | 0 |
0%
|
| Sysmiss | 1 |