| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 1 |
0.4%
|
| -7 | does not apply | 0 |
0%
|
| 0 | no obstacle | 125 |
51.9%
|
| 1 | minor obstacle | 64 |
26.6%
|
| 2 | moderate obstacle | 25 |
10.4%
|
| 3 | major obstacle | 14 |
5.8%
|
| 4 | very severe obstacle | 12 |
5%
|