| Value | Category | Cases | |
|---|---|---|---|
| 0 | 342 | 
                                    
                                    9.4%
                                 | |
| 1 | 1283 | 
                                    
                                    35.4%
                                 | |
| Missing value | 2000 | 
                                    
                                    55.2%
                                 |