| Value | Category |
|---|---|
| 0 | Early childhood |
| 1 | |
| 2 | |
| 11 | p-1 |
| 12 | p-2 |
| 13 | p-3 |
| 14 | p-4 |
| 15 | p-5 |
| 16 | p-6 |
| 21 | ls-1 |
| 22 | ls-2 |
| 23 | ls-3 |
| 31 | us-1 |
| 32 | us-2 |
| 33 | us-3 |
| 34 | us-4 |
| 35 | us-5 |
| 36 | us-6 |
| 37 | us-7 |
| 41 | Teacher training |
| 42 | Nursing/public health |
| 43 | Non - tertiary |
| 44 | Tertiary diploma |
| 51 | Bachelors |
| 52 | Masters |
| 53 | Doctoral |
| Sysmiss |