| Value | Category | Cases | |
|---|---|---|---|
| 0 | Always | 2845 |
79.6%
|
| 1 | Often | 98 |
2.7%
|
| 2 | Sometimes | 9 |
0.3%
|
| 3 | Rarely | 5 |
0.1%
|
| 4 | Never | 407 |
11.4%
|
| 8 | Refused | 25 |
0.7%
|
| 9 | Missing | 185 |
5.2%
|
| Sysmiss | 45 |