| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 2 |
2.2%
|
| 2 | Every few weeks | 6 |
6.7%
|
| 3 | Every few months | 23 |
25.6%
|
| 4 | Not at all | 59 |
65.6%
|
| Sysmiss | 21 |