| Value | Category | Cases | |
|---|---|---|---|
| 1 | Sand | 345 |
3.1%
|
| 2 | Smoothed mud | 8658 |
76.8%
|
| 3 | Smooth cement | 2244 |
19.9%
|
| 4 | Wood | 3 |
0%
|
| 5 | Tile | 26 |
0.2%
|
| 6 | Other | 2 |
0%
|
| Sysmiss | 2 |