| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, seen | 421 | 
                                    
                                    25.3%
                                 | 
| 2 | Yes, not seen | 643 | 
                                    
                                    38.6%
                                 | 
| 3 | No | 602 | 
                                    
                                    36.1%
                                 | 
| Sysmiss | 301 |