| Value | Category | Cases | |
|---|---|---|---|
| 1 | a. 2 years | 17 |
7.5%
|
| 2 | b. 3 years | 23 |
10.2%
|
| 3 | c. 4 years | 13 |
5.8%
|
| 4 | d. 5 years | 15 |
6.6%
|
| 5 | e. More than 5 years | 98 |
43.4%
|
| 6 | f. Never been to school | 60 |
26.5%
|
| Sysmiss | 1492 |