| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 2 |
0.8%
|
| -7 | does not apply | 0 |
0%
|
| 0 | no obstacle | 140 |
58.1%
|
| 1 | minor obstacle | 58 |
24.1%
|
| 2 | moderate obstacle | 22 |
9.1%
|
| 3 | major obstacle | 16 |
6.6%
|
| 4 | very severe obstacle | 3 |
1.2%
|