| Value | Category | Cases | |
|---|---|---|---|
| 0 | Always | 27 |
0.8%
|
| 1 | Often | 10 |
0.3%
|
| 2 | Sometimes | 574 |
16.1%
|
| 3 | Rarely | 127 |
3.6%
|
| 4 | Never | 2816 |
78.8%
|
| 8 | Refused | 0 |
0%
|
| 9 | Missing | 20 |
0.6%
|
| Sysmiss | 45 |