| Value |
Category |
| 1 |
one school year |
| 2 |
two school years |
| 3 |
three school years |
| 4 |
four or more school years |
| 6 |
not applicable |
| 8 |
not admin. |
| 9 |
missing |
| 11 |
.A |
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.