| Value | Category | Cases | |
|---|---|---|---|
| 1 | 28 | 
                                    
                                    0.1%
                                 | |
| 2 | 3 | 
                                    
                                    0%
                                 | |
| 3 | 2 | 
                                    
                                    0%
                                 | |
| 98 | Do not know | 4 | 
                                    
                                    0%
                                 | 
| 99 | Unspecified | 20944 | 
                                    
                                    99.8%
                                 | 
| 888 | Not applicable | 4 | 
                                    
                                    0%
                                 |