| Value | Category | Cases | |
|---|---|---|---|
| 1 | Don't know | 37 |
1.5%
|
| 2 | Not Applicable | 21 |
0.9%
|
| 3 | 1 Not an obstacle | 302 |
12.5%
|
| 4 | 2 Minor obstacle | 634 |
26.2%
|
| 5 | 3 Moderate obstacle | 928 |
38.3%
|
| 6 | 4 Major obstacle | 502 |
20.7%
|