| Value | Category | Cases | |
|---|---|---|---|
| 1 | Can read only | 2771 |
5.6%
|
| 2 | Can write only | 538 |
1.1%
|
| 3 | Can read and write | 20343 |
41.2%
|
| 4 | Cannot read and write | 25778 |
52.2%
|
| Sysmiss | 19540 |