| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 7 |
1.4%
|
| 2 | Every few weeks | 99 |
19.7%
|
| 3 | Every few months | 258 |
51.4%
|
| 4 | Not at all | 138 |
27.5%
|
| -99 | 25 | ||
| 11 | 1 | ||
| Sysmiss | 52 |