| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 12 | 
                                    
                                    1.2%
                                 | 
| 2 | NO | 290 | 
                                    
                                    28.9%
                                 | 
| Sysmiss | 702 | 
                                    
                                    69.9%
                                 |