| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 34 |
6.2%
|
| 2 | Every few weeks | 116 |
21.1%
|
| 3 | Every few months | 273 |
49.5%
|
| 4 | Not at all | 128 |
23.2%
|
| Sysmiss | 12 |