| Value | Category | Cases | |
|---|---|---|---|
| 2 | MONTHS | 325 | 
                                    
                                    9.6%
                                 | 
| 2 | MONTHS | 240 | 
                                    
                                    7.1%
                                 | 
| Sysmiss | 2826 | 
                                    
                                    83.3%
                                 |