| Value | Category | Cases | |
|---|---|---|---|
| -9 | 20 | 
                                    
                                    14.5%
                                 | |
| 0 | 81 | 
                                    
                                    58.7%
                                 | |
| 1 | 8 | 
                                    
                                    5.8%
                                 | |
| 2 | 4 | 
                                    
                                    2.9%
                                 | |
| 3 | 1 | 
                                    
                                    0.7%
                                 | |
| 4 | 1 | 
                                    
                                    0.7%
                                 | |
| 5 | 12 | 
                                    
                                    8.7%
                                 | |
| 10 | 4 | 
                                    
                                    2.9%
                                 | |
| 15 | 4 | 
                                    
                                    2.9%
                                 | |
| 20 | 2 | 
                                    
                                    1.4%
                                 | |
| 30 | 1 | 
                                    
                                    0.7%
                                 | |
| Sysmiss | 77 |