| Value | Category | Cases | |
|---|---|---|---|
| 1 | a. 2 years | 362 |
6.2%
|
| 2 | b. 3 years | 287 |
4.9%
|
| 3 | c. 4 years | 212 |
3.7%
|
| 4 | d. 5 years | 255 |
4.4%
|
| 5 | e. More than 5 years | 2245 |
38.7%
|
| 6 | f. Never been to school | 2444 |
42.1%
|
| Sysmiss | 16936 |