| Value | Category | Cases | |
|---|---|---|---|
| 1 | a. 2 years | 459 |
1.9%
|
| 2 | b. 3 years | 361 |
1.5%
|
| 3 | c. 4 years | 285 |
1.2%
|
| 4 | d. 5 years | 283 |
1.2%
|
| 5 | e. More than 5 years | 1527 |
6.3%
|
| 6 | f. Never been to school | 43 |
0.2%
|
| Missing value | 21414 |
87.9%
|