| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 144 | 
                                    
                                    10.6%
                                 | 
| 2 | NO | 656 | 
                                    
                                    48.1%
                                 | 
| Sysmiss | 564 | 
                                    
                                    41.3%
                                 |