| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 0 |
0%
|
| -7 | does not apply | 2 |
1.4%
|
| 0 | no obstacle | 75 |
50.7%
|
| 1 | minor obstacle | 37 |
25%
|
| 2 | moderate obstacle | 20 |
13.5%
|
| 3 | major obstacle | 12 |
8.1%
|
| 4 | very severe obstacle | 2 |
1.4%
|