| Value | Category | Cases | |
|---|---|---|---|
| 0 | less than 1 km | 96 | 
                                    
                                    68.1%
                                 | 
| 1 | 24 | 
                                    
                                    17%
                                 | |
| 2 | 5 | 
                                    
                                    3.5%
                                 | |
| 3 | 7 | 
                                    
                                    5%
                                 | |
| 4 | 3 | 
                                    
                                    2.1%
                                 | |
| 5 | 1 | 
                                    
                                    0.7%
                                 | |
| 6 | 2 | 
                                    
                                    1.4%
                                 | |
| 7 | 1 | 
                                    
                                    0.7%
                                 | |
| 12 | 1 | 
                                    
                                    0.7%
                                 | |
| 14 | 1 | 
                                    
                                    0.7%
                                 | |
| Sysmiss | 369 |