| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 53 |
11%
|
| -7 | Does not apply | 15 |
3.1%
|
| 0 | No Obstacle | 338 |
70.1%
|
| 1 | Minor Obstacle | 40 |
8.3%
|
| 2 | Moderate Obstacle | 20 |
4.1%
|
| 3 | Major Obstacle | 8 |
1.7%
|
| 4 | Very Severe Obstacle | 8 |
1.7%
|