| Value | Category | Cases | |
|---|---|---|---|
| -99 | 53 |
13.4%
|
|
| 1 | Every few days | 17 |
4.3%
|
| 2 | Every few weeks | 27 |
6.8%
|
| 3 | Every few months | 138 |
34.9%
|
| 4 | Not at all | 79 |
20%
|
| Sysmiss | 81 |
20.5%
|