| Value | Category | Cases | |
|---|---|---|---|
| 0 | Always | 17 |
0.5%
|
| 1 | Often | 11 |
0.3%
|
| 2 | Sometimes | 279 |
7.8%
|
| 3 | Rarely | 92 |
2.6%
|
| 4 | Never | 3152 |
88.2%
|
| 8 | Refused | 0 |
0%
|
| 9 | Missing | 23 |
0.6%
|
| Sysmiss | 45 |