| Value | Category | Cases | |
|---|---|---|---|
| 1 | Proficient | 47 |
1.2%
|
| 2 | Good | 236 |
5.9%
|
| 3 | Basic | 502 |
12.5%
|
| 4 | None | 3224 |
80.4%
|
| 9 | Missing value | 3 |
0.1%
|