| Value | Category | Cases | |
|---|---|---|---|
| -99 | 78 |
27.2%
|
|
| 1 | Every few days | 13 |
4.5%
|
| 2 | Every few weeks | 19 |
6.6%
|
| 3 | Every few months | 48 |
16.7%
|
| 4 | Not at all | 129 |
44.9%
|
| Sysmiss | 88 |