| Value | Category | Cases | |
|---|---|---|---|
| 1 | Proficient | 4334 |
25%
|
| 2 | Good | 5195 |
30%
|
| 3 | Basic | 2518 |
14.5%
|
| 4 | None | 5295 |
30.5%
|
| 9 | Missing value | 3 |
0%
|