| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 5 |
2.2%
|
| 2 | Every few weeks | 35 |
15.4%
|
| 3 | Every few months | 136 |
59.6%
|
| 4 | Not at all | 52 |
22.8%
|
| -99 | 3 | ||
| Sysmiss | 29 |