| Value | Category | Cases | |
|---|---|---|---|
| 0 | Always | 6 |
0.5%
|
| 1 | Often | 3 |
0.2%
|
| 2 | Sometimes | 161 |
13.1%
|
| 3 | Rarely | 58 |
4.7%
|
| 4 | Never | 998 |
81.1%
|
| 8 | Refused | 0 |
0%
|
| 9 | Missing | 5 |
0.4%
|
| Sysmiss | 25 |