| Value | Category | Cases | |
|---|---|---|---|
| 1 | 7th grade | 2 | 
                                    
                                    0.1%
                                 | 
| 2 | 8th grade | 456 | 
                                    
                                    34.1%
                                 | 
| 3 | 9th grade | 529 | 
                                    
                                    39.5%
                                 | 
| 4 | 10th grade | 350 | 
                                    
                                    26.2%
                                 | 
| 5 | 11th grade | 1 | 
                                    
                                    0.1%
                                 | 
| 6 | 12th grade | 0 | 
                                    
                                    0%
                                 | 
| Sysmiss | 19 |