| Value |
Category |
| 1 |
At school |
| 2 |
At work |
| 3 |
Boarding/traveling |
| 4 |
Serious Illness |
| 5 |
Refusal |
| 6 |
Other |
| 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.