| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not mentioned | 1014 | 
                                                                 
                                    
                                    81.8%
                                 
                                                             | 
                                                        
                    
| 1 | Mentioned | 4 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 221 | 
                                                                 
                                    
                                    17.8%
                                 
                                                             |