| Value | Category | Cases | |
|---|---|---|---|
| 0 | 26 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 98 | Do not know | 6 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 99 | Unspecified | 21158 | 
                                                                 
                                    
                                    99.8%
                                 
                                                             |