| Value | Category | Cases | |
|---|---|---|---|
| 0 | 8 | 
                                    
                                    0.6%
                                 | |
| 1 | 17 | 
                                    
                                    1.2%
                                 | |
| 2 | 63 | 
                                    
                                    4.5%
                                 | |
| 3 | 185 | 
                                    
                                    13.3%
                                 | |
| 4 | 376 | 
                                    
                                    27.1%
                                 | |
| 5 | 378 | 
                                    
                                    27.3%
                                 | |
| 6 | 220 | 
                                    
                                    15.9%
                                 | |
| 7 | 95 | 
                                    
                                    6.9%
                                 | |
| 8 | 44 | 
                                    
                                    3.2%
                                 | |
| Sysmiss | 114 |