| Value | Category | Cases | |
|---|---|---|---|
| 0 | Always | 39 |
1.1%
|
| 1 | Often | 16 |
0.4%
|
| 2 | Sometimes | 824 |
23.1%
|
| 3 | Rarely | 162 |
4.5%
|
| 4 | Never | 2515 |
70.4%
|
| 8 | Refused | 0 |
0%
|
| 9 | Missing | 18 |
0.5%
|
| Sysmiss | 45 |