| Value | Category | Cases | |
|---|---|---|---|
| 1 | Sheet metal | 817 |
20.6%
|
| 2 | Tile | 49 |
1.2%
|
| 3 | Concrete | 31 |
0.8%
|
| 4 | Hides/skins | 12 |
0.3%
|
| 5 | Wood | 408 |
10.3%
|
| 6 | Dirt | 1677 |
42.3%
|
| 7 | Straw | 891 |
22.5%
|
| 8 | Other | 83 |
2.1%
|