| Value | Category | Cases | |
|---|---|---|---|
| 1 | Don't know | 16 |
0.7%
|
| 2 | Not Applicable | 5 |
0.2%
|
| 3 | 1 Not an obstacle | 576 |
23.8%
|
| 4 | 2 Minor obstacle | 720 |
29.7%
|
| 5 | 3 Moderate obstacle | 709 |
29.2%
|
| 6 | 4 Major obstacle | 398 |
16.4%
|