| Value | Category | Cases | |
|---|---|---|---|
| 0 | Always | 5 |
0.1%
|
| 1 | Often | 4 |
0.1%
|
| 2 | Sometimes | 379 |
10.6%
|
| 3 | Rarely | 48 |
1.3%
|
| 4 | Never | 3119 |
87.3%
|
| 8 | Refused | 0 |
0%
|
| 9 | Missing | 19 |
0.5%
|
| Sysmiss | 45 |