| Value | Category | Cases | |
|---|---|---|---|
| 1 | Sandy | 803 |
19.4%
|
| 2 | Clay | 2292 |
55.2%
|
| 3 | Mainly mixture of sand and clay | 785 |
18.9%
|
| 4 | Other (specify | 269 |
6.5%
|
| Sysmiss | 1 |