| Value | Category | Cases | |
|---|---|---|---|
| -2 | do not know | 0 |
0%
|
| -1 | not applicable | 0 |
0%
|
| 1 | iron/metal | 347 |
5%
|
| 2 | asbestos | 224 |
3.2%
|
| 3 | tiles | 4 |
0.1%
|
| 4 | corrugated iron sheets | 619 |
8.9%
|
| 5 | grass/straw | 5724 |
82.7%
|
| 6 | other | 4 |
0.1%
|