| Value | Category | Cases | |
|---|---|---|---|
| -99 | 65 |
22.6%
|
|
| 1 | Every few days | 36 |
12.5%
|
| 2 | Every few weeks | 52 |
18.1%
|
| 3 | Every few months | 61 |
21.2%
|
| 4 | Not at all | 74 |
25.7%
|
| Sysmiss | 87 |