| Value |
Category |
| 0 |
Before Grade E1 |
| 1 |
Grade E1 |
| 2 |
Grade E2 |
| 3 |
Grade 3 |
| 4 |
Grade 4 |
| 9 |
Not Important |
| 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.