| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not mentioned | 993 | 
                                                                 
                                    
                                    80.1%
                                 
                                                             | 
                                                        
                    
| 1 | Mentioned | 36 | 
                                                                 
                                    
                                    2.9%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 210 | 
                                                                 
                                    
                                    16.9%
                                 
                                                             |