| Value | Category | Cases | |
|---|---|---|---|
| 1 | No problems | 884 | 
                                    
                                    99.5%
                                 | 
| 2 | Little difficulty | 4 | 
                                    
                                    0.5%
                                 | 
| 3 | Moderate difficulty | 0 | 
                                    
                                    0%
                                 | 
| 4 | Serious difficulty | 0 | 
                                    
                                    0%
                                 | 
| 9 | Missing | 0 | 
                                    
                                    0%
                                 | 
| Sysmiss | 1 |