| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 1 |
0.2%
|
| -7 | Does not apply | 0 |
0%
|
| 0 | No Obstacle | 7 |
1.5%
|
| 1 | Minor Obstacle | 11 |
2.3%
|
| 2 | Moderate Obstacle | 44 |
9.1%
|
| 3 | Major Obstacle | 87 |
18%
|
| 4 | Very Severe Obstacle | 332 |
68.9%
|