| Value | Category | Cases | |
|---|---|---|---|
| 0 | Pre-primay | 18 | 
                                
                                9.6%
                             | 
| 1 | Primary | 33 | 
                                
                                17.6%
                             | 
| 2 | Unclassified | 0 | 
                                
                                0%
                             | 
| 5 | Missing | 0 | 
                                
                                0%
                             | 
| 9 | NA | 136 | 
                                
                                72.7%
                             |