| Value | Category | Cases | |
|---|---|---|---|
| 0 | Always | 7 |
0.2%
|
| 1 | Often | 3 |
0.1%
|
| 2 | Sometimes | 138 |
3.9%
|
| 3 | Rarely | 26 |
0.7%
|
| 4 | Never | 3381 |
94.6%
|
| 8 | Refused | 0 |
0%
|
| 9 | Missing | 19 |
0.5%
|
| Sysmiss | 45 |