| Value |
Category |
| 1 |
regular, every month |
| 2 |
periodical, 5 - 6 times a year |
| 3 |
rare, 1 - 2 times a year |
| 4 |
seasonal |
| 99889988 |
refusal |
| 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.