| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 45 |
2.9%
|
| -7 | Does not apply (spontaneous) | 268 |
17%
|
| 1 | Good understanding | 791 |
50.3%
|
| 2 | Average understanding | 318 |
20.2%
|
| 3 | Poor understanding | 151 |
9.6%
|