| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 3 |
0.1%
|
| 0 | Never | 659 |
27.5%
|
| 1 | Only sometimes | 1049 |
43.7%
|
| 2 | Often | 473 |
19.7%
|
| 3 | Always | 165 |
6.9%
|
| 9 | Don't know | 51 |
2.1%
|