| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 1 |
0.7%
|
| -7 | does not apply | 2 |
1.4%
|
| 0 | no obstacle | 47 |
31.8%
|
| 1 | minor obstacle | 45 |
30.4%
|
| 2 | moderate obstacle | 33 |
22.3%
|
| 3 | major obstacle | 15 |
10.1%
|
| 4 | very severe obstacle | 5 |
3.4%
|