| Value | Category | Cases | |
|---|---|---|---|
| 1 | Ash | 1149 |
78%
|
| 2 | Do not use anything | 25 |
1.7%
|
| 3 | Other (please specify) | 96 |
6.5%
|
| 4 | Sand | 38 |
2.6%
|
| 5 | Water only | 166 |
11.3%
|