| Value | Category | Cases | |
|---|---|---|---|
| 0 | 7 | 
                                    
                                    0.5%
                                 | |
| 1 | 14 | 
                                    
                                    1%
                                 | |
| 2 | 67 | 
                                    
                                    4.8%
                                 | |
| 3 | 187 | 
                                    
                                    13.5%
                                 | |
| 4 | 383 | 
                                    
                                    27.6%
                                 | |
| 5 | 328 | 
                                    
                                    23.6%
                                 | |
| 6 | 254 | 
                                    
                                    18.3%
                                 | |
| 7 | 101 | 
                                    
                                    7.3%
                                 | |
| 8 | 46 | 
                                    
                                    3.3%
                                 | |
| Sysmiss | 113 |