| Value | Category | Cases | |
|---|---|---|---|
| 0 | 2073 | 
                                    
                                    57.2%
                                 | |
| 1 | 614 | 
                                    
                                    16.9%
                                 | |
| 99 | 24 | 
                                    
                                    0.7%
                                 | |
| Missing value | 914 | 
                                    
                                    25.2%
                                 |