| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 6 |
1.3%
|
| 2 | Every few weeks | 18 |
3.9%
|
| 3 | Every few months | 56 |
12.3%
|
| 4 | Not at all | 377 |
82.5%
|
| Sysmiss | 48 |