| Value | Category | Cases | |
|---|---|---|---|
| 0 | 3 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 1 | yes | 556 | 
                                                                 
                                    
                                    12.4%
                                 
                                                             | 
                                                        
                    
| 2 | no | 3937 | 
                                                                 
                                    
                                    87.6%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 4 |