| Value | Category | Cases | |
|---|---|---|---|
| -99 | 11 |
4.3%
|
|
| 1 | Every few days | 11 |
4.3%
|
| 2 | Every few weeks | 33 |
12.9%
|
| 3 | Every few months | 85 |
33.2%
|
| 4 | Not at all | 83 |
32.4%
|
| Sysmiss | 33 |
12.9%
|