| Value | Category | Cases | |
|---|---|---|---|
| 1 | Earth/mud | 2460 |
66.2%
|
| 2 | Wood | 107 |
2.9%
|
| 3 | Stone/Brick | 12 |
0.3%
|
| 4 | Cement/Concrete | 1123 |
30.2%
|
| 5 | Other | 12 |
0.3%
|
| Sysmiss | 6 |