| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 489 | 
                                    
                                    35.9%
                                 | 
| 2 | NO | 42 | 
                                    
                                    3.1%
                                 | 
| Sysmiss | 833 | 
                                    
                                    61.1%
                                 |