| Value | Category | Cases | |
|---|---|---|---|
| -9 | 1 | 23 | 
                                    
                                    3.4%
                                 | 
| -7 | 2 | 107 | 
                                    
                                    15.8%
                                 | 
| 0 | 3 | 244 | 
                                    
                                    35.9%
                                 | 
| 1 | 4 | 267 | 
                                    
                                    39.3%
                                 | 
| 2 | 5 | 10 | 
                                    
                                    1.5%
                                 | 
| 3 | 6 | 20 | 
                                    
                                    2.9%
                                 | 
| 4 | 7 | 7 | 
                                    
                                    1%
                                 | 
| 5 | 8 | 1 | 
                                    
                                    0.1%
                                 | 
| Sysmiss | 276 |