| Value | Category | Cases | |
|---|---|---|---|
| 1 | MONTHS | 216 | 
                                    
                                    1.5%
                                 | 
| 2 | YEARS | 5187 | 
                                    
                                    36.3%
                                 | 
| 9 | SPECIAL | 5892 | 
                                    
                                    41.2%
                                 | 
| Sysmiss | 3002 | 
                                    
                                    21%
                                 |