| Value | Category | Cases | |
|---|---|---|---|
| 0 | Always | 41 |
1.1%
|
| 1 | Often | 6 |
0.2%
|
| 2 | Sometimes | 281 |
7.9%
|
| 3 | Rarely | 160 |
4.5%
|
| 4 | Never | 3065 |
85.8%
|
| 8 | Refused | 1 |
0%
|
| 9 | Missing | 20 |
0.6%
|
| Sysmiss | 45 |