| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.5%
|
|
| 1 | Every few days | 7 |
3.4%
|
| 2 | Every few weeks | 33 |
16.3%
|
| 3 | Every few months | 73 |
36%
|
| 4 | Not at all | 89 |
43.8%
|
| Sysmiss | 22 |