| Value | Category | Cases | |
|---|---|---|---|
| 1 | Days | 0 | 
                                    
                                    0%
                                 | 
| 2 | Weeks | 0 | 
                                    
                                    0%
                                 | 
| 3 | Months | 9 | 
                                    
                                    10.2%
                                 | 
| 4 | Years | 79 | 
                                    
                                    89.8%
                                 | 
| Sysmiss | 847 |