| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 6 |
2.5%
|
| -7 | does not apply | 0 |
0%
|
| 0 | no obstacle | 136 |
56.4%
|
| 1 | minor obstacle | 46 |
19.1%
|
| 2 | moderate obstacle | 22 |
9.1%
|
| 3 | major obstacle | 8 |
3.3%
|
| 4 | very severe obstacle | 23 |
9.5%
|