| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 9 | 
                                    
                                    0.7%
                                 | 
| 2 | 12 years old | 237 | 
                                    
                                    17.5%
                                 | 
| 3 | 13 years old | 517 | 
                                    
                                    38.2%
                                 | 
| 4 | 14 years old | 404 | 
                                    
                                    29.9%
                                 | 
| 5 | 15 years old | 150 | 
                                    
                                    11.1%
                                 | 
| 6 | 16 years old | 35 | 
                                    
                                    2.6%
                                 | 
| 7 | 17 years old | 1 | 
                                    
                                    0.1%
                                 | 
| 8 | 18 years old or older | 0 | 
                                    
                                    0%
                                 | 
| Sysmiss | 4 |