| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 54 | 
                                    
                                    9.3%
                                 | 
| 2 | NO | 75 | 
                                    
                                    12.9%
                                 | 
| Sysmiss | 454 | 
                                    
                                    77.9%
                                 |