| Value | Category |
|---|---|
| 0 | NONE |
| 1 | N1 |
| 2 | N2 |
| 3 | |
| 11 | P1 |
| 12 | P2 |
| 13 | P3 |
| 14 | P4 |
| 15 | P5 |
| 16 | P6 |
| 21 | JS1 |
| 22 | JS2 |
| 23 | JS3 |
| 24 | SS1 |
| 25 | SS2 |
| 26 | SS3 |
| 27 | LOWER 6 |
| 28 | UPPER 6 |
| 31 | TEACHER TRAINING |
| 32 | VOCATIONAL/TECHNICAL |
| 33 | MODERN SCHOOL |
| 34 | NCE |
| 41 | POLY/PROF |
| 42 | 1ST DEGREE |
| 43 | HIGHER DEGREE |
| 51 | QUARANIC |
| 52 | INTEGRATED QUARANIC |
| 61 | ADULT EDUCATION |
| Sysmiss |