| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 688 | 
                                    
                                    18.3%
                                 | 
| 2 | NO | 6 | 
                                    
                                    0.2%
                                 | 
| Sysmiss | 3063 | 
                                    
                                    81.5%
                                 |