| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not mentioned | 1511 | 
                                                                 
                                    
                                    82.7%
                                 
                                                             | 
                                                        
                    
| 1 | mentioned | 315 | 
                                                                 
                                    
                                    17.3%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 157 |