| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 7 |
4.5%
|
| 2 | Every few weeks | 32 |
20.4%
|
| 3 | Every few months | 45 |
28.7%
|
| 4 | Not at all | 73 |
46.5%
|
| -99 | 15 | ||
| Sysmiss | 32 |