| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 2 |
1.2%
|
| 2 | Every few weeks | 16 |
9.9%
|
| 3 | Every few months | 75 |
46.6%
|
| 4 | Not at all | 68 |
42.2%
|
| -99 | 11 | ||
| Sysmiss | 32 |