| Value | Category | Cases | |
|---|---|---|---|
| 98 | do not know | 87 | 
                                                                 
                                    
                                    76.3%
                                 
                                                             | 
                                                        
                    
| 99 | not stated | 27 | 
                                                                 
                                    
                                    23.7%
                                 
                                                             |