| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 170 |
19.6%
|
| 1 | Yes, more than once in the last six months | 502 |
57.8%
|
| 2 | Yes, once in the last six months | 196 |
22.6%
|
| Sysmiss | 6979 |