| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 14 |
4.7%
|
| 2 | Every few weeks | 66 |
22.2%
|
| 3 | Every few months | 147 |
49.5%
|
| 4 | Not at all | 70 |
23.6%
|
| -99 | 7 | ||
| Sysmiss | 56 |