| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 1 |
1.1%
|
| 2 | Every few weeks | 8 |
8.6%
|
| 3 | Every few months | 15 |
16.1%
|
| 4 | Not at all | 69 |
74.2%
|
| Sysmiss | 16 |