| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 9 |
3.7%
|
| -7 | does not apply | 0 |
0%
|
| 0 | no obstacle | 139 |
57.7%
|
| 1 | minor obstacle | 32 |
13.3%
|
| 2 | moderate obstacle | 18 |
7.5%
|
| 3 | major obstacle | 28 |
11.6%
|
| 4 | very severe obstacle | 15 |
6.2%
|