| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 7 |
4.8%
|
| 2 | Every few weeks | 17 |
11.6%
|
| 3 | Every few months | 16 |
11%
|
| 4 | Not at all | 104 |
71.2%
|
| -99 | 2 |
1.4%
|
|
| Sysmiss | 19 |