| Value |
Category |
| 00 |
NIU (not in universe) |
| 11 |
Primary, 1st grade |
| 12 |
Primary, 2nd grade |
| 13 |
Primary, 3rd grade |
| 14 |
Primary, 4th grade |
| 15 |
Primary, 5th grade |
| 16 |
Primary, 6th grade |
| 21 |
Secondary (academic), 7th grade |
| 22 |
Secondary (academic), 8th grade |
| 23 |
Secondary (academic), 9th grade |
| 24 |
Secondary (academic), 10th grade |
| 25 |
Secondary (academic), 11th grade |
| 31 |
Secondary (technical), 7th grade |
| 32 |
Secondary (technical), 8th grade |
| 33 |
Secondary (technical), 9th grade |
| 34 |
Secondary (technical), 10th grade |
| 35 |
Secondary (technical), 11th grade |
| 36 |
Secondary (technical), 12th grade |
| 41 |
Technical college, 1st year |
| 42 |
Technical college, 2nd year |
| 43 |
Technical college, 3rd year |
| 51 |
University, 1st year |
| 52 |
University, 2nd year |
| 53 |
University, 3rd year |
| 54 |
University, 4th year |
| 55 |
University, 5th year |
| 56 |
University, 6th year |
| 57 |
University, 7th year |
| 58 |
University, 8th year |
| 59 |
University, 9th year |
| 60 |
No grade |
| 70 |
Special education |
| 80 |
Kindergarten or preschool |
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.