| Value | Category | Cases | |
|---|---|---|---|
| 1 | Grade V and above | 420 | 
                                    
                                    25.4%
                                 | 
| 2 | Grade III | 1182 | 
                                    
                                    71.5%
                                 | 
| 3 | Untrained, unlicensed | 51 | 
                                    
                                    3.1%
                                 | 
| Sysmiss | 222 |