| Value | Category | Cases | |
|---|---|---|---|
| 0 | Always | 139 |
3.9%
|
| 1 | Often | 8 |
0.2%
|
| 2 | Sometimes | 11 |
0.3%
|
| 3 | Rarely | 11 |
0.3%
|
| 4 | Never | 3365 |
94.2%
|
| 8 | Refused | 0 |
0%
|
| 9 | Missing | 40 |
1.1%
|
| Sysmiss | 45 |