| Value | Category | Cases | |
|---|---|---|---|
| 0 | 3 | 
                                    
                                    14.3%
                                 | |
| 15 | 1 | 
                                    
                                    4.8%
                                 | |
| 20 | 3 | 
                                    
                                    14.3%
                                 | |
| 30 | 8 | 
                                    
                                    38.1%
                                 | |
| 45 | 4 | 
                                    
                                    19%
                                 | |
| 50 | 2 | 
                                    
                                    9.5%
                                 | |
| Sysmiss | 379 |