| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
0.7%
|
| -7 | Does not apply | 0 |
0%
|
| 0 | No obstacle | 207 |
35.4%
|
| 1 | Minor obstacle | 131 |
22.4%
|
| 2 | Moderate obstacle | 121 |
20.7%
|
| 3 | Major obstacle | 59 |
10.1%
|
| 4 | Very severe obstacle | 62 |
10.6%
|
| Sysmiss | 17 |