| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 317 |
21%
|
| -7 | Does not apply (spontaneous) | 100 |
6.6%
|
| 1 | Good understanding | 192 |
12.7%
|
| 2 | Average understanding | 773 |
51.1%
|
| 3 | Poor understanding | 130 |
8.6%
|
| Sysmiss | 1443 |