| Value | Category | Cases | |
|---|---|---|---|
| 0 | 158 | 
                                    
                                    4.4%
                                 | |
| 1 | 17 | 
                                    
                                    0.5%
                                 | |
| Missing value | 3450 | 
                                    
                                    95.2%
                                 |