| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. Sand/dirt/straw | 347 |
7.6%
|
| 2 | 2. Smoothed mud | 970 |
21.1%
|
| 3 | 3. Smooth cement | 3020 |
65.8%
|
| 4 | 4. Wood | 35 |
0.8%
|
| 5 | 5. Tile | 211 |
4.6%
|
| 6 | 6. Other (specify) | 6 |
0.1%
|
| Sysmiss | 22 |