| Value | Category | Cases | |
|---|---|---|---|
| 1 | 10 | 
                                    
                                    0%
                                 | |
| 2 | 2 | 
                                    
                                    0%
                                 | |
| 98 | Do not know | 4 | 
                                    
                                    0%
                                 | 
| 99 | Unspecified | 20965 | 
                                    
                                    99.9%
                                 | 
| 888 | Not applicable | 4 | 
                                    
                                    0%
                                 |