| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 3 |
1.8%
|
| 2 | Every few weeks | 12 |
7.2%
|
| 3 | Every few months | 38 |
22.9%
|
| 4 | Not at all | 97 |
58.4%
|
| -99 | 16 |
9.6%
|
|
| Sysmiss | 25 |