| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 814 | 
                                                                 
                                    
                                    99.8%
                                 
                                                             | 
                                                        
                    
| 1 | yes | 2 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 3972 |