| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 51 | 
                                    
                                    12.7%
                                 | 
| 2 | NO | 320 | 
                                    
                                    79.8%
                                 | 
| Sysmiss | 30 | 
                                    
                                    7.5%
                                 |