| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 2 |
1.8%
|
| 2 | Every few weeks | 7 |
6.1%
|
| 3 | Every few months | 20 |
17.5%
|
| 4 | Not at all | 85 |
74.6%
|
| Sysmiss | 42 |