| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not mentioned | 756 | 
                                                                 
                                    
                                    61%
                                 
                                                             | 
                                                        
                    
| 1 | Mentioned | 273 | 
                                                                 
                                    
                                    22%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 210 | 
                                                                 
                                    
                                    16.9%
                                 
                                                             |