| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 21 | 
                                    
                                    1.3%
                                 | 
| 1 | Yes | 1593 | 
                                    
                                    98.7%
                                 | 
| 999 | Refused/Skipped | 0 | 
                                    
                                    0%
                                 | 
| Sysmiss | 208 |