| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 5 |
1.7%
|
| 2 | Every few weeks | 22 |
7.7%
|
| 3 | Every few months | 98 |
34.1%
|
| 4 | Not at all | 162 |
56.4%
|
| Sysmiss | 81 |