| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 275 |
18.2%
|
| -7 | Does not apply (spontaneous) | 85 |
5.6%
|
| 1 | Good understanding | 287 |
19%
|
| 2 | Average understanding | 779 |
51.5%
|
| 3 | Poor understanding | 86 |
5.7%
|
| Sysmiss | 1443 |