| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 1 |
0.6%
|
| 2 | Every few weeks | 9 |
5.6%
|
| 3 | Every few months | 44 |
27.3%
|
| 4 | Not at all | 107 |
66.5%
|
| -99 | 11 | ||
| Sysmiss | 32 |