| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 8143 | 
                                    
                                    98.8%
                                 | 
| 1 | yes | 54 | 
                                    
                                    0.7%
                                 | 
| 8 | dk | 36 | 
                                    
                                    0.4%
                                 | 
| 9 | 6 | 
                                    
                                    0.1%
                                 |