| Value | Category | Cases | |
|---|---|---|---|
| 1 | not mentioned | 30 | 
                                                                 
                                    
                                    96.8%
                                 
                                                             | 
                                                        
                    
| 2 | mentioned | 1 | 
                                                                 
                                    
                                    3.2%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 296 |