| Value | Category | Cases | |
|---|---|---|---|
| 0 | Always | 20 |
0.6%
|
| 1 | Often | 9 |
0.3%
|
| 2 | Sometimes | 901 |
25.2%
|
| 3 | Rarely | 172 |
4.8%
|
| 4 | Never | 2456 |
68.7%
|
| 8 | Refused | 0 |
0%
|
| 9 | Missing | 16 |
0.4%
|
| Sysmiss | 45 |