| Value | Category | Cases | |
|---|---|---|---|
| 1 | GRADE 1 | 4705 | 
                                    
                                    10.1%
                                 | 
| 2 | GRADE 2 | 10457 | 
                                    
                                    22.4%
                                 | 
| 3 | GRADE 3 | 2051 | 
                                    
                                    4.4%
                                 | 
| 4 | GRADE 4 | 5998 | 
                                    
                                    12.8%
                                 | 
| 5 | GRADE 5 | 2035 | 
                                    
                                    4.4%
                                 | 
| 6 | GRADE 6 | 2702 | 
                                    
                                    5.8%
                                 | 
| 7 | GRADE 7 | 2230 | 
                                    
                                    4.8%
                                 | 
| 8 | GRADE 8 | 1988 | 
                                    
                                    4.3%
                                 | 
| 9 | GRADE 9 | 3385 | 
                                    
                                    7.2%
                                 | 
| 10 | GRADE10 | 2545 | 
                                    
                                    5.4%
                                 | 
| 11 | GRADE11 | 6 | 
                                    
                                    0%
                                 | 
| 12 | GRADE12 | 16 | 
                                    
                                    0%
                                 | 
| 13 | GRADE13 | 10 | 
                                    
                                    0%
                                 | 
| 14 | GRADE14 | 32 | 
                                    
                                    0.1%
                                 | 
| 97 | Inconsistent | 9 | 
                                    
                                    0%
                                 | 
| 98 | DK | 26 | 
                                    
                                    0.1%
                                 | 
| 99 | NO RESPONSE | 1 | 
                                    
                                    0%
                                 | 
| Sysmiss | 8533 | 
                                    
                                    18.3%
                                 |