| Value | Category | Cases | |
|---|---|---|---|
| -999999 | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| -9 | DON'T KNOW | 4 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    
| -7 | DOES NOT APPLY | 2 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    
| 0 | No obstacle | 471 | 
                                                                 
                                    
                                    45.7%
                                 
                                                             | 
                                                        
                    
| 1 | Minor obstacle | 160 | 
                                                                 
                                    
                                    15.5%
                                 
                                                             | 
                                                        
                    
| 2 | Moderate obstacle | 180 | 
                                                                 
                                    
                                    17.5%
                                 
                                                             | 
                                                        
                    
| 3 | Major obstacle | 157 | 
                                                                 
                                    
                                    15.2%
                                 
                                                             | 
                                                        
                    
| 4 | Very severe obstacle | 55 | 
                                                                 
                                    
                                    5.3%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 2 |