| Value |
Category |
| -99 |
Don't know |
| 0 |
No year approved in the level |
| 1 |
|
| 2 |
|
| 3 |
|
| 4 |
|
| 5 |
|
| 6 |
|
| 10 |
|
| 31 |
Graduated (?) |
| 33 |
|
| 39 |
|
| Sysmiss |
|
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.