| Value | Category | Cases | |
|---|---|---|---|
| -99 | 6 |
2.3%
|
|
| 1 | Every few days | 3 |
1.1%
|
| 2 | Every few weeks | 32 |
12.3%
|
| 3 | Every few months | 123 |
47.1%
|
| 4 | Not at all | 47 |
18%
|
| Sysmiss | 50 |
19.2%
|