| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 1 |
0.2%
|
| -7 | Does not apply | 0 |
0%
|
| 0 | No Obstacle | 188 |
39%
|
| 1 | Minor Obstacle | 116 |
24.1%
|
| 2 | Moderate Obstacle | 97 |
20.1%
|
| 3 | Major Obstacle | 56 |
11.6%
|
| 4 | Very Severe Obstacle | 24 |
5%
|