| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Good | 1756 | 1980 |
13.1%
|
| 2 | know it somehow | 1552 | 1680 |
11.1%
|
| 3 | fair knowledge | 1542 | 1639 |
10.9%
|
| 9 | Don't know | 10227 | 9773 |
64.8%
|
| 8 | 3 | 7 |