| Value | Category | Cases | |
|---|---|---|---|
| 0 | 1 | 
                                    
                                    0.1%
                                 | |
| 1 | 62 | 
                                    
                                    4.7%
                                 | |
| 2 | 310 | 
                                    
                                    23.5%
                                 | |
| 3 | 490 | 
                                    
                                    37.2%
                                 | |
| 4 | 305 | 
                                    
                                    23.2%
                                 | |
| 5 | 107 | 
                                    
                                    8.1%
                                 | |
| 6 | 33 | 
                                    
                                    2.5%
                                 | |
| 7 | 9 | 
                                    
                                    0.7%
                                 | |
| Sysmiss | 1 |