| Value | Category | Cases | |
|---|---|---|---|
| 0 | 997 | 
                                    
                                    12.1%
                                 | |
| 1 | 27 | 
                                    
                                    0.3%
                                 | |
| Missing value | 7221 | 
                                    
                                    87.6%
                                 |