| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 112 | 
                                    
                                    25.2%
                                 | 
| 2 | NO | 18 | 
                                    
                                    4%
                                 | 
| Sysmiss | 315 | 
                                    
                                    70.8%
                                 |