| Value | Category | Cases | |
|---|---|---|---|
| 1 | grade_1 | 23 | 
                                    
                                    0.9%
                                 | 
| 2 | grade_10 | 16 | 
                                    
                                    0.6%
                                 | 
| 3 | grade_11 | 30 | 
                                    
                                    1.2%
                                 | 
| 4 | grade_12 | 16 | 
                                    
                                    0.6%
                                 | 
| 5 | grade_2 | 27 | 
                                    
                                    1.1%
                                 | 
| 6 | grade_3 | 21 | 
                                    
                                    0.8%
                                 | 
| 7 | grade_4 | 32 | 
                                    
                                    1.2%
                                 | 
| 8 | grade_5 | 34 | 
                                    
                                    1.3%
                                 | 
| 9 | grade_6 | 45 | 
                                    
                                    1.8%
                                 | 
| 10 | grade_7 | 22 | 
                                    
                                    0.9%
                                 | 
| 11 | grade_8 | 19 | 
                                    
                                    0.7%
                                 | 
| 12 | grade_9 | 38 | 
                                    
                                    1.5%
                                 | 
| 13 | no | 300 | 
                                    
                                    11.7%
                                 | 
| 14 | PreferNotAnswer | 19 | 
                                    
                                    0.7%
                                 | 
| Missing value | 1926 | 
                                    
                                    75%
                                 |