Value |
Category |
1 |
Grade 1 |
2 |
Grade 2 |
3 |
Grade 3 |
4 |
Grade 4 |
5 |
Grade 5 |
6 |
Grade 6 |
8 |
do not know |
9 |
not applicable |
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.