| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 69 | 
                                    
                                    11.3%
                                 | 
| 2 | NO | 73 | 
                                    
                                    11.9%
                                 | 
| Sysmiss | 469 | 
                                    
                                    76.8%
                                 |