| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 2 |
0.7%
|
| 2 | Every few weeks | 12 |
4.2%
|
| 3 | Every few months | 91 |
31.5%
|
| 4 | Not at all | 184 |
63.7%
|
| Sysmiss | 79 |