| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not mentioned | 974 | 
                                                                 
                                    
                                    78.6%
                                 
                                                             | 
                                                        
                    
| 1 | Mentioned | 44 | 
                                                                 
                                    
                                    3.6%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 221 | 
                                                                 
                                    
                                    17.8%
                                 
                                                             |