| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 15 | 
                                    
                                    4.2%
                                 | 
| 2 | NO | 47 | 
                                    
                                    13.2%
                                 | 
| Sysmiss | 294 | 
                                    
                                    82.6%
                                 |