| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 148 |
17.1%
|
| 1 | Yes, more than once in the last six months | 504 |
58.1%
|
| 2 | Yes, once in the last six months | 216 |
24.9%
|
| Sysmiss | 6979 |