| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 2446 |
71.1%
|
| 1 | Often | 77 |
2.2%
|
| 2 | Sometimes | 918 |
26.7%
|
| 9 | Missing | 18 | |
| Sysmiss | 31137 |