| Value | Category | Cases | |
|---|---|---|---|
| -999999 | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| -9 | DON'T KNOW | 4 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    
| -7 | DOES NOT APPLY | 3 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    
| 0 | No obstacle | 592 | 
                                                                 
                                    
                                    57.5%
                                 
                                                             | 
                                                        
                    
| 1 | Minor obstacle | 214 | 
                                                                 
                                    
                                    20.8%
                                 
                                                             | 
                                                        
                    
| 2 | Moderate obstacle | 136 | 
                                                                 
                                    
                                    13.2%
                                 
                                                             | 
                                                        
                    
| 3 | Major obstacle | 72 | 
                                                                 
                                    
                                    7%
                                 
                                                             | 
                                                        
                    
| 4 | Very severe obstacle | 8 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 2 |