| Value |
Category |
| 1 |
monthly |
| 2 |
Quarterly |
| 3 |
Weekly |
| 4 |
Annual |
| 5 |
un specified |
| 96 |
Other specify |
| 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.