| Value | Category | Cases | |
|---|---|---|---|
| 1 | 0-11 | 1800 | 
                                    
                                    19.9%
                                 | 
| 2 | 12-23 | 1688 | 
                                    
                                    18.7%
                                 | 
| 3 | 24-35 | 1732 | 
                                    
                                    19.2%
                                 | 
| 4 | 36-47 | 1889 | 
                                    
                                    20.9%
                                 | 
| 5 | 48-59 | 1814 | 
                                    
                                    20.1%
                                 | 
| Sysmiss | 114 | 
                                    
                                    1.3%
                                 |