| Value | Category | Cases | |
|---|---|---|---|
| 0 | 68 | 
                                                                 
                                    
                                    90.7%
                                 
                                                             | 
                                                        
                    |
| 1 | 7 | 
                                                                 
                                    
                                    9.3%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 21 |