| Value | Category | Cases | |
|---|---|---|---|
| 1 | Can not read and write | 18495 |
23%
|
| 2 | Can read only | 5571 |
6.9%
|
| 3 | Can read and write | 40603 |
50.5%
|
| 4 | 1 |
0%
|
|
| 9 | Missing | 15715 |
19.5%
|
| Sysmiss | 55 |