| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Concrete | 314 | 319 |
11.5%
|
| 2 | Mud | 2419 | 2412 |
86.8%
|
| 3 | Straw | 5 | 4 |
0.1%
|
| 4 | Wood | 1 | 1 |
0%
|
| 6 | Other | 38 | 43 |
1.6%
|
| 9 | Missing | 0 | 0 | |
| Sysmiss | 6 | 3 |