| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 4 |
2.4%
|
| 2 | Every few weeks | 15 |
9%
|
| 3 | Every few months | 52 |
31.3%
|
| 4 | Not at all | 85 |
51.2%
|
| -99 | 10 |
6%
|
|
| Sysmiss | 25 |