| Value | Category | Cases | |
|---|---|---|---|
| 1 | Reinforced concrete casting | 3545 |
94.8%
|
| 2 | Metallic | 60 |
1.6%
|
| 3 | Wood | 12 |
0.3%
|
| 4 | Asbestos\fiber cemen | 118 |
3.2%
|
| 5 | Straw\palm fronds | 1 |
0%
|
| 6 | Other | 3 |
0.1%
|