| Value | Category | Cases | |
|---|---|---|---|
| 0 | Always | 18 |
0.5%
|
| 1 | Often | 7 |
0.2%
|
| 2 | Sometimes | 683 |
19.1%
|
| 3 | Rarely | 146 |
4.1%
|
| 4 | Never | 2693 |
75.3%
|
| 8 | Refused | 0 |
0%
|
| 9 | Missing | 27 |
0.8%
|
| Sysmiss | 45 |