| Value | Category | Cases | |
|---|---|---|---|
| -9 | 25 | 
                                    
                                    13%
                                 | |
| 0 | 49 | 
                                    
                                    25.4%
                                 | |
| 1 | 19 | 
                                    
                                    9.8%
                                 | |
| 2 | 32 | 
                                    
                                    16.6%
                                 | |
| 3 | 50 | 
                                    
                                    25.9%
                                 | |
| 4 | 9 | 
                                    
                                    4.7%
                                 | |
| 5 | 6 | 
                                    
                                    3.1%
                                 | |
| 6 | 1 | 
                                    
                                    0.5%
                                 | |
| 8 | 1 | 
                                    
                                    0.5%
                                 | |
| 20 | 1 | 
                                    
                                    0.5%
                                 | |
| Sysmiss | 22 |