| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | straw | 1812 | 2623890 |
3.3%
|
| 2 | mud | 253 | 349083 |
0.4%
|
| 3 | wood | 6911 | 10116646 |
12.6%
|
| 4 | steel ( galvanised) | 239 | 332090 |
0.4%
|
| 5 | reinforced concrete | 39388 | 65874368 |
82.3%
|
| 6 | tiles | 80 | 139075 |
0.2%
|
| 7 | other | 503 | 626231 |
0.8%
|