| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
3%
|
| -7 | Does not apply (spontaneous) | 0 |
0%
|
| 0 | No obstacle | 71 |
70.3%
|
| 1 | Minor obstacle | 9 |
8.9%
|
| 2 | Moderate obstacle | 6 |
5.9%
|
| 3 | Major obstacle | 6 |
5.9%
|
| 4 | Very severe obstacle | 6 |
5.9%
|
| Sysmiss | 124 |