| Value | Category | Cases | |
|---|---|---|---|
| 29 | 13 | 
                                    
                                    5.7%
                                 | |
| 30 | 49 | 
                                    
                                    21.3%
                                 | |
| 31 | 38 | 
                                    
                                    16.5%
                                 | |
| 32 | 61 | 
                                    
                                    26.5%
                                 | |
| 33 | 39 | 
                                    
                                    17%
                                 | |
| 34 | 30 | 
                                    
                                    13%
                                 | |
| Sysmiss | 81 |