| Value | Category | Cases | |
|---|---|---|---|
| 1 | Days | 90 | 
                                    
                                    3.3%
                                 | 
| 2 | Weeks | 545 | 
                                    
                                    20.1%
                                 | 
| 3 | Months | 2073 | 
                                    
                                    76.6%
                                 | 
| Sysmiss | 933 |