| Value | Category | Cases | |
|---|---|---|---|
| 0 | Always | 12 |
0.3%
|
| 1 | Often | 2 |
0.1%
|
| 2 | Sometimes | 14 |
0.4%
|
| 3 | Rarely | 10 |
0.3%
|
| 4 | Never | 3349 |
93.7%
|
| 8 | Refused | 0 |
0%
|
| 9 | Missing | 187 |
5.2%
|
| Sysmiss | 45 |