| Value | Category | Cases | |
|---|---|---|---|
| 0 | Always | 13 |
1.1%
|
| 1 | Often | 9 |
0.7%
|
| 2 | Sometimes | 157 |
12.8%
|
| 3 | Rarely | 52 |
4.2%
|
| 4 | Never | 998 |
81.1%
|
| 8 | Refused | 0 |
0%
|
| 9 | Missing | 2 |
0.2%
|
| Sysmiss | 25 |