| Value |
Category |
| 1 |
no |
| 2 |
oral weekly |
| 3 |
oral monthly |
| 4 |
written < month |
| 5 |
written, 1-11 |
| 6 |
written 1yr |
| 7 |
written perm |
| 8 |
other |
| 9 |
not applicable/miss |
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.