| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 55 | 
                                    
                                    13.7%
                                 | 
| 2 | NO | 8 | 
                                    
                                    2%
                                 | 
| Sysmiss | 338 | 
                                    
                                    84.3%
                                 |