| Value | Category | Cases | |
|---|---|---|---|
| 1 | 7th grade | 946 | 
                                    
                                    38.6%
                                 | 
| 2 | 8th grade | 747 | 
                                    
                                    30.5%
                                 | 
| 3 | 9th grade | 755 | 
                                    
                                    30.8%
                                 |