| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 0 |
0%
|
| -7 | does not apply | 0 |
0%
|
| 0 | no obstacle | 79 |
32.8%
|
| 1 | minor obstacle | 37 |
15.4%
|
| 2 | moderate obstacle | 63 |
26.1%
|
| 3 | major obstacle | 45 |
18.7%
|
| 4 | very severe obstacle | 17 |
7.1%
|