| Value | Category | Cases | |
|---|---|---|---|
| 1 | Concrete slab | 4 |
0.1%
|
| 2 | Slate | 7 |
0.2%
|
| 3 | Eternit | 18 |
0.4%
|
| 4 | Tile | 77 |
1.9%
|
| 5 | Galavanized sheet metal | 1421 |
34.9%
|
| 6 | Rycled sheet metal | 292 |
7.2%
|
| 7 | Straw | 2121 |
52.1%
|
| 8 | Tarpaulin | 59 |
1.4%
|
| 9 | Other (specify) | 69 |
1.7%
|
| Missing value | 1 |
0%
|