| Value | Category | Cases | |
|---|---|---|---|
| 0 | Always | 13 |
0.4%
|
| 1 | Often | 4 |
0.1%
|
| 2 | Sometimes | 645 |
18%
|
| 3 | Rarely | 145 |
4.1%
|
| 4 | Never | 2753 |
77%
|
| 8 | Refused | 0 |
0%
|
| 9 | Missing | 14 |
0.4%
|
| Sysmiss | 45 |