| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 16 | 
                                    
                                    3.6%
                                 | 
| 2 | NO | 32 | 
                                    
                                    7.2%
                                 | 
| Sysmiss | 397 | 
                                    
                                    89.2%
                                 |