| Value | Category | Cases | |
|---|---|---|---|
| 0 | 446 | 
                                    
                                    12.3%
                                 | |
| 1 | 111 | 
                                    
                                    3.1%
                                 | |
| 99 | 8 | 
                                    
                                    0.2%
                                 | |
| Missing value | 3060 | 
                                    
                                    84.4%
                                 |