| Value | Category | Cases | |
|---|---|---|---|
| 1 | 0-11 | 3262 | 
                                    
                                    19.6%
                                 | 
| 2 | 12-23 | 3205 | 
                                    
                                    19.3%
                                 | 
| 3 | 24-35 | 3142 | 
                                    
                                    18.9%
                                 | 
| 4 | 36-47 | 3624 | 
                                    
                                    21.8%
                                 | 
| 5 | 48-59 | 3390 | 
                                    
                                    20.4%
                                 | 
| Sysmiss | 66 |