| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. Grass | 645 |
14.1%
|
| 2 | 2. Iron sheets | 3521 |
76.7%
|
| 3 | 3. Clay tiles | 37 |
0.8%
|
| 4 | 4. Concrete | 40 |
0.9%
|
| 5 | 5. Plastic sheeting | 29 |
0.6%
|
| 6 | 6. Asbestos sheet | 260 |
5.7%
|
| 7 | 7. Other (specify) | 57 |
1.2%
|
| Sysmiss | 22 |