| Value | Category | Cases | |
|---|---|---|---|
| 15 | 3 | 
                                    
                                    20%
                                 | |
| 16 | 3 | 
                                    
                                    20%
                                 | |
| 17 | 7 | 
                                    
                                    46.7%
                                 | |
| 18 | 2 | 
                                    
                                    13.3%
                                 | |
| Sysmiss | 385 |