| Value | Category | Cases | |
|---|---|---|---|
| 1 | Cement | 478 |
20%
|
| 2 | Wood | 24 |
1%
|
| 3 | Earth | 1877 |
78.7%
|
| 4 | Ironsheet | 2 |
0.1%
|
| 5 | Other | 4 |
0.2%
|
| Sysmiss | 15 |