Value |
Category |
1 |
weekly |
2 |
monthly |
3 |
every three months |
4 |
every six months |
5 |
once a year |
6 |
other |
9 |
don't know |
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.