| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 4 |
1.7%
|
| -7 | does not apply | 1 |
0.4%
|
| 0 | no obstacle | 67 |
27.8%
|
| 1 | minor obstacle | 53 |
22%
|
| 2 | moderate obstacle | 50 |
20.7%
|
| 3 | major obstacle | 43 |
17.8%
|
| 4 | very severe obstacle | 23 |
9.5%
|