| Value | Category | Cases | |
|---|---|---|---|
| 1 | Cannot read or write | 3397 |
36.4%
|
| 2 | Can sign only | 1981 |
21.2%
|
| 3 | Can read only | 211 |
2.3%
|
| 4 | Can read and write | 3749 |
40.1%
|
| Sysmiss | 317 |