| Value | Category | Cases | |
|---|---|---|---|
| 1 | Proficient | 103 |
2.6%
|
| 2 | Good | 384 |
9.6%
|
| 3 | Basic | 863 |
21.5%
|
| 4 | None | 2659 |
66.3%
|
| 9 | Missing value | 3 |
0.1%
|