| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 18 | 
                                                                 
                                    
                                    90%
                                 
                                                             | 
                                                        
                    
| 1 | yes | 1 | 
                                                                 
                                    
                                    5%
                                 
                                                             | 
                                                        
                    
| 9 | 1 | 
                                                                 
                                    
                                    5%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 384 |