| Value | Category | Cases | |
|---|---|---|---|
| 1 | Male | 18381 | 
                                    
                                    90.9%
                                 | 
| 2 | Female | 1833 | 
                                    
                                    9.1%
                                 | 
| 9 | Missing | 0 | 
                                    
                                    0%
                                 | 
| Sysmiss | 307 |