| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 17 | 
                                    
                                    4.2%
                                 | 
| 2 | NO | 65 | 
                                    
                                    16.2%
                                 | 
| Sysmiss | 319 | 
                                    
                                    79.6%
                                 |