| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 7 |
4.7%
|
| -7 | does not apply | 20 |
13.5%
|
| 0 | no obstacle | 92 |
62.2%
|
| 1 | minor obstacle | 16 |
10.8%
|
| 2 | moderate obstacle | 6 |
4.1%
|
| 3 | major obstacle | 4 |
2.7%
|
| 4 | very severe obstacle | 3 |
2%
|