| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0 | 9 | 
                                    
                                    0.9%
                                 | 
| 1 | 1 | 6 | 
                                    
                                    0.6%
                                 | 
| 2 | 2 | 4 | 
                                    
                                    0.4%
                                 | 
| 88 | Not applicable | 735 | 
                                    
                                    73.5%
                                 | 
| 99 | Unspecified | 246 | 
                                    
                                    24.6%
                                 |