| Value | Category | Cases | |
|---|---|---|---|
| 1 | Coal | 1219 |
39.9%
|
| 2 | Briquette | 10 |
0.3%
|
| 3 | Wood, willow and sawdust | 670 |
21.9%
|
| 4 | Manure and dung | 1099 |
36%
|
| 6 | Other (typing) | 58 |
1.9%
|
| Sysmiss | 934 |