| Value | Category | Cases | |
|---|---|---|---|
| -8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 7 | 6 | 
                                    
                                    0.6%
                                 | |
| 8 | 102 | 
                                    
                                    10.7%
                                 | |
| 9 | 251 | 
                                    
                                    26.3%
                                 | |
| 10 | 201 | 
                                    
                                    21%
                                 | |
| 11 | 123 | 
                                    
                                    12.9%
                                 | |
| 12 | 95 | 
                                    
                                    9.9%
                                 | |
| 13 | 63 | 
                                    
                                    6.6%
                                 | |
| 14 | 47 | 
                                    
                                    4.9%
                                 | |
| 15 | 37 | 
                                    
                                    3.9%
                                 | |
| 16 | 15 | 
                                    
                                    1.6%
                                 | |
| 17 | 11 | 
                                    
                                    1.2%
                                 | |
| 18 | 1 | 
                                    
                                    0.1%
                                 | |
| 19 | 3 | 
                                    
                                    0.3%
                                 |