Value |
Category |
1 |
Weekly |
2 |
Biweekly |
3 |
Monthly |
4 |
Biannulay |
5 |
Annualy |
6 |
Never |
7 |
Others |
9 |
Not stated |
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.