| Value | Category | Cases | |
|---|---|---|---|
| 0 | Skip | 12 |
50%
|
| 1 | Fresh water | 9 |
37.5%
|
| 2 | Brackish water | 2 |
8.3%
|
| 3 | Other | 1 |
4.2%
|
| Sysmiss | 12 |