| Value | Category | Cases | |
|---|---|---|---|
| 1 | Grass | 1 |
1.4%
|
| 2 | Iron sheets | 13 |
17.6%
|
| 3 | Clay tiles | 8 |
10.8%
|
| 4 | Concrete | 32 |
43.2%
|
| 5 | Plastic sheeting | 20 |
27%
|
| 6 | Other | 0 |
0%
|
| 9 | Missing | 0 |
0%
|