| Value | Category | Cases | |
|---|---|---|---|
| 0 | 405 | 
                                                                 
                                    
                                    95.1%
                                 
                                                             | 
                                                        
                    |
| 1 | 21 | 
                                                                 
                                    
                                    4.9%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 4 |