| Value | Category | Cases | |
|---|---|---|---|
| 1 | 0 | 9 | 
                                    
                                    0.4%
                                 | 
| 2 | 1 | 158 | 
                                    
                                    6.9%
                                 | 
| Missing value | 2124 | 
                                    
                                    92.7%
                                 |