| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 1 |
0.4%
|
| -7 | does not apply | 1 |
0.4%
|
| 0 | no obstacle | 68 |
28.2%
|
| 1 | minor obstacle | 83 |
34.4%
|
| 2 | moderate obstacle | 46 |
19.1%
|
| 3 | major obstacle | 26 |
10.8%
|
| 4 | very severe obstacle | 16 |
6.6%
|