| Value | Category | Cases | |
|---|---|---|---|
| 0 | Always | 18 |
0.5%
|
| 1 | Often | 6 |
0.2%
|
| 2 | Sometimes | 60 |
1.7%
|
| 3 | Rarely | 16 |
0.4%
|
| 4 | Never | 3450 |
96.5%
|
| 8 | Refused | 1 |
0%
|
| 9 | Missing | 23 |
0.6%
|
| Sysmiss | 45 |