Value |
Category |
-999 |
-999 |
-888 |
-888 |
1 |
Monthly |
2 |
Every 3 months |
3 |
Every 6 month |
4 |
Annually |
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.