| Value | Category | Cases | |
|---|---|---|---|
| 1 | Days | 3 | 
                                    
                                    2.3%
                                 | 
| 2 | Weeks | 1 | 
                                    
                                    0.8%
                                 | 
| 3 | Months | 59 | 
                                    
                                    44.4%
                                 | 
| 4 | Years | 70 | 
                                    
                                    52.6%
                                 | 
| Sysmiss | 243 |