| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 144 | 
                                    
                                    13.4%
                                 | 
| 2 | NO | 405 | 
                                    
                                    37.8%
                                 | 
| Sysmiss | 523 | 
                                    
                                    48.8%
                                 |