| Value | Category | Cases | |
|---|---|---|---|
| 1 | Proficient | 2211 |
12.7%
|
| 2 | Good | 2513 |
14.5%
|
| 3 | Basic | 3408 |
19.6%
|
| 4 | None | 9207 |
53.1%
|
| 9 | Missing value | 6 |
0%
|