| Value | Category | Cases | |
|---|---|---|---|
| 1 | Easily | 2929 | 
                                    
                                    47%
                                 | 
| 3 | Difficultly | 1953 | 
                                    
                                    31.3%
                                 | 
| 5 | Could not do it | 1355 | 
                                    
                                    21.7%
                                 | 
| Sysmiss | 18690 |