| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 31 | 
                                    
                                    7%
                                 | 
| 2 | NO | 29 | 
                                    
                                    6.5%
                                 | 
| Sysmiss | 385 | 
                                    
                                    86.5%
                                 |