| Value | Category | Cases | |
|---|---|---|---|
| 1 | Grass | 0 |
0%
|
| 2 | Iron sheets | 7 |
14.9%
|
| 3 | Clay tiles | 3 |
6.4%
|
| 4 | Concrete | 27 |
57.4%
|
| 5 | Plastic sheeting | 9 |
19.1%
|
| 6 | Other | 0 |
0%
|
| 9 | Missing | 1 |
2.1%
|