| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0 | 72 | 
                                    
                                    7.2%
                                 | 
| 1 | 1 | 51 | 
                                    
                                    5.1%
                                 | 
| 8 | Not applicable | 877 | 
                                    
                                    87.7%
                                 | 
| 9 | Unspecified | 0 | 
                                    
                                    0%
                                 |