| Value |
Category |
| 0 |
|
| 1 |
Yes, less than 12 months ago |
| 2 |
Yes, more than 12 months ago |
| 3 |
Never |
| 5 |
|
| 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.