| Value | Category | Cases | |
|---|---|---|---|
| 1 | can read and write | 9047 |
73.3%
|
| 2 | can read only | 396 |
3.2%
|
| 3 | cannot read nor write | 2853 |
23.1%
|
| 4 | prefer not to answer | 45 |
0.4%
|
| Sysmiss | 3252 |