| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 27 | 
                                    
                                    10%
                                 | 
| -8 | Refused | 1 | 
                                    
                                    0.4%
                                 | 
| -7 | DOES NOT APPLY | 8 | 
                                    
                                    3%
                                 | 
| 0 | No obstacle | 45 | 
                                    
                                    16.7%
                                 | 
| 1 | Minor obstacle | 28 | 
                                    
                                    10.4%
                                 | 
| 2 | Moderate obstacle | 31 | 
                                    
                                    11.5%
                                 | 
| 3 | Major obstacle | 65 | 
                                    
                                    24.1%
                                 | 
| 4 | Very severe obstacle | 65 | 
                                    
                                    24.1%
                                 | 
| Sysmiss | 685 |