| Value | Category | Cases | |
|---|---|---|---|
| 0 | 8 | 
                                    
                                    1.8%
                                 | |
| 1 | 93 | 
                                    
                                    20.4%
                                 | |
| 2 | 309 | 
                                    
                                    67.9%
                                 | |
| 3 | 31 | 
                                    
                                    6.8%
                                 | |
| 4 | 12 | 
                                    
                                    2.6%
                                 | |
| 5 | 2 | 
                                    
                                    0.4%
                                 | |
| Sysmiss | 956 |