| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 79 | 
                                    
                                    10.8%
                                 | 
| 2 | NO | 37 | 
                                    
                                    5%
                                 | 
| Sysmiss | 617 | 
                                    
                                    84.2%
                                 |