| Value | Category | Cases | |
|---|---|---|---|
| 0 | Always | 13 |
0.4%
|
| 1 | Often | 9 |
0.3%
|
| 2 | Sometimes | 406 |
11.4%
|
| 3 | Rarely | 158 |
4.4%
|
| 4 | Never | 2970 |
83.1%
|
| 8 | Refused | 0 |
0%
|
| 9 | Missing | 18 |
0.5%
|
| Sysmiss | 45 |