| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 12 | 
                                    
                                    60%
                                 | 
| 1 | yes | 7 | 
                                    
                                    35%
                                 | 
| 9 | 1 | 
                                    
                                    5%
                                 | |
| Sysmiss | 384 |