| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 11 |
2.3%
|
| -7 | Does not apply | 31 |
6.4%
|
| 0 | No Obstacle | 80 |
16.6%
|
| 1 | Minor Obstacle | 81 |
16.8%
|
| 2 | Moderate Obstacle | 83 |
17.2%
|
| 3 | Major Obstacle | 86 |
17.8%
|
| 4 | Very Severe Obstacle | 110 |
22.8%
|