| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 25 | 
                                    
                                    3.1%
                                 | 
| 2 | NO | 241 | 
                                    
                                    29.7%
                                 | 
| Sysmiss | 546 | 
                                    
                                    67.2%
                                 |