| Value | Category | Cases | |
|---|---|---|---|
| 0 | Ash | 169 |
41.9%
|
| 1 | Do not use anything | 3 |
0.7%
|
| 2 | Don't know | 5 |
1.2%
|
| 3 | Other | 17 |
4.2%
|
| 4 | Sand | 7 |
1.7%
|
| 5 | Water only | 202 |
50.1%
|