| Value |
Category |
| -9 |
DK |
| 1 |
Monthly |
| 2 |
Bimonthly |
| 3 |
Quarterly |
| 4 |
Annually |
| 5 |
Not predetermined schedule |
| 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.
