| Value | Category | Cases | |
|---|---|---|---|
| 0 | Always | 56 |
1.6%
|
| 1 | Often | 10 |
0.3%
|
| 2 | Sometimes | 41 |
1.1%
|
| 3 | Rarely | 26 |
0.7%
|
| 4 | Never | 3420 |
95.7%
|
| 8 | Refused | 1 |
0%
|
| 9 | Missing | 20 |
0.6%
|
| Sysmiss | 45 |