| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 80 |
7.3%
|
| -7 | NE S'APPLIQUE PAS (SPONTANEOUS) | 46 |
4.2%
|
| 0 | Not an obstacle | 133 |
12.1%
|
| 1 | Minor obstacle | 244 |
22.3%
|
| 2 | Moderate obstacle | 376 |
34.3%
|
| 3 | Major obstacle | 182 |
16.6%
|
| 4 | A very serious obstacle | 35 |
3.2%
|