| Value | Category | Cases | |
|---|---|---|---|
| 1 | Has functional difficulty | 18 | 
                                    
                                    1.2%
                                 | 
| 2 | Has no functional difficulty | 919 | 
                                    
                                    58.8%
                                 | 
| Sysmiss | 627 | 
                                    
                                    40.1%
                                 |