| Value | Category | Cases | |
|---|---|---|---|
| 1 | Proficient | 32 |
0.8%
|
| 2 | Good | 25 |
0.6%
|
| 3 | Basic | 17 |
0.4%
|
| 4 | None | 3905 |
97.3%
|
| 9 | Missing value | 33 |
0.8%
|