| Value | Category | Cases | |
|---|---|---|---|
| 1 | Mud/earth | 16614 |
86.6%
|
| 2 | Concrete/tile | 2510 |
13.1%
|
| 3 | Other | 61 |
0.3%
|
| 11 | .A | 170 | |
| Sysmiss | 483 |