| Value | Category | Cases | |
|---|---|---|---|
| 1 | Proficient | 2430 |
14%
|
| 2 | Good | 2857 |
16.5%
|
| 3 | Basic | 3974 |
22.9%
|
| 4 | None | 8078 |
46.6%
|
| 9 | Missing value | 6 |
0%
|