| Value |
Category |
| 00 |
None |
| 11 |
Primary, one year |
| 12 |
Primary, two years |
| 13 |
Primary, three years |
| 14 |
Primary, four years |
| 15 |
Primary, five years |
| 16 |
Primary, six years |
| 19 |
Primary, year unknown |
| 21 |
Middle (secondary), one year |
| 22 |
Middle (secondary), two years |
| 23 |
Middle (secondary), three years |
| 24 |
Middle (secondary), four years |
| 25 |
Middle (secondary), five years |
| 26 |
Middle (secondary), six years |
| 29 |
Middle (secondary), year unknown |
| 31 |
Superior (post-secondary), one year |
| 32 |
Superior (post-secondary), two years |
| 33 |
Superior (post-secondary), three years |
| 34 |
Superior (post-secondary), four years |
| 35 |
Superior (post-secondary), five years |
| 36 |
Superior (post-secondary), six years |
| 39 |
Superior (post-secondary), year unknown |
| 98 |
Unknown |
| 99 |
NIU (not in universe) |
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.