| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 48 | 
                                    
                                    3.2%
                                 | 
| 2 | NO | 337 | 
                                    
                                    22.2%
                                 | 
| Sysmiss | 1136 | 
                                    
                                    74.7%
                                 |