| Value | Category | Cases | |
|---|---|---|---|
| 0 | Always | 15 |
0.4%
|
| 1 | Often | 3 |
0.1%
|
| 2 | Sometimes | 129 |
3.6%
|
| 3 | Rarely | 85 |
2.4%
|
| 4 | Never | 3330 |
93.2%
|
| 8 | Refused | 1 |
0%
|
| 9 | Missing | 11 |
0.3%
|
| Sysmiss | 45 |