| Value | Category | Cases | |
|---|---|---|---|
| -9 | 519 | 
                                
                                12%
                             | |
| 1 | Days | 0 | 
                                
                                0%
                             | 
| 2 | Weeks | 1 | 
                                
                                0%
                             | 
| 3 | Months | 248 | 
                                
                                5.7%
                             | 
| 4 | Years | 0 | 
                                
                                0%
                             | 
| 9 | Not applicable | 3568 | 
                                
                                82.3%
                             | 
| Sysmiss | 4 |