| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 0 |
0%
|
| -7 | does not apply | 0 |
0%
|
| 0 | no obstacle | 116 |
48.1%
|
| 1 | minor obstacle | 55 |
22.8%
|
| 2 | moderate obstacle | 46 |
19.1%
|
| 3 | major obstacle | 12 |
5%
|
| 4 | very severe obstacle | 12 |
5%
|