| Value | Category | Cases | |
|---|---|---|---|
| 0 | Always | 16 |
1.3%
|
| 1 | Often | 1 |
0.1%
|
| 2 | Sometimes | 2 |
0.2%
|
| 3 | Rarely | 6 |
0.5%
|
| 4 | Never | 1138 |
92.4%
|
| 8 | Refused | 1 |
0.1%
|
| 9 | Missing | 67 |
5.4%
|
| Sysmiss | 25 |