| Value | Category | Cases | |
|---|---|---|---|
| 1 | Well below cesspit | 207 | 
                                    
                                    11.2%
                                 | 
| 2 | Well above cesspit | 989 | 
                                    
                                    53.6%
                                 | 
| 3 | On the same level | 417 | 
                                    
                                    22.6%
                                 | 
| Sysmiss | 233 |