| Value | Category | Cases | |
|---|---|---|---|
| 1 | Concrete | 0 |
0%
|
| 2 | Wood | 17 |
4.1%
|
| 3 | Metal sheets/zinks | 254 |
60.8%
|
| 4 | Tile | 72 |
17.2%
|
| 5 | Grass | 58 |
13.9%
|
| 6 | Leaves | 5 |
1.2%
|
| 7 | Other, specify | 12 |
2.9%
|