| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not seen | 932 | 
                                                                 
                                    
                                    21.9%
                                 
                                                             | 
                                                        
                    
| 1 | Yes, seen | 3326 | 
                                                                 
                                    
                                    78.1%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 2223 |