| Value |
Category |
| -99 |
-99.Don't know |
| -55 |
-55.Missing |
| 1 |
1.Per days |
| 2 |
2.Per week |
| 3 |
3.Per month |
| 4 |
4.Per 3 month |
| 5 |
5.Per 6 month |
| 6 |
6.Year |
| 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.