| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 2 |
0.7%
|
| 2 | Every few weeks | 30 |
10.1%
|
| 3 | Every few months | 185 |
62.5%
|
| 4 | Not at all | 79 |
26.7%
|
| -99 | 8 | ||
| Sysmiss | 56 |