| Value | Category | Cases | |
|---|---|---|---|
| -99 | 11 |
3.2%
|
|
| 1 | Every few days | 10 |
2.9%
|
| 2 | Every few weeks | 56 |
16%
|
| 3 | Every few months | 142 |
40.7%
|
| 4 | Not at all | 98 |
28.1%
|
| Sysmiss | 32 |
9.2%
|