| Value | Category | Cases | |
|---|---|---|---|
| 1 | Don't know | 17 |
0.7%
|
| 2 | Not Applicable | 10 |
0.4%
|
| 3 | 1 Not an obstacle | 213 |
8.8%
|
| 4 | 2 Minor obstacle | 532 |
21.9%
|
| 5 | 3 Moderate obstacle | 938 |
38.7%
|
| 6 | 4 Major obstacle | 714 |
29.5%
|