| Value | Category | Cases | |
|---|---|---|---|
| 1 | Proficient | 45 |
1.1%
|
| 2 | Good | 236 |
5.9%
|
| 3 | Basic | 593 |
14.8%
|
| 4 | None | 3135 |
78.1%
|
| 9 | Missing value | 3 |
0.1%
|