| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 220 | 
                                    
                                    16.1%
                                 | 
| 2 | NO | 30 | 
                                    
                                    2.2%
                                 | 
| Sysmiss | 1114 | 
                                    
                                    81.7%
                                 |