| Value | Category | Cases | |
|---|---|---|---|
| 1 | sand/dirt/straw | 500 |
10.2%
|
| 2 | smoothed mud | 1038 |
21.2%
|
| 3 | smooth cement | 3218 |
65.8%
|
| 4 | wood | 51 |
1%
|
| 5 | tile | 69 |
1.4%
|
| 6 | other (specify) | 14 |
0.3%
|
| Sysmiss | 39 |