| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 68 | 
                                    
                                    12.8%
                                 | 
| 2 | NO | 29 | 
                                    
                                    5.4%
                                 | 
| Sysmiss | 436 | 
                                    
                                    81.8%
                                 |