| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 2 |
0.2%
|
| 0 | Never | 291 |
27.8%
|
| 1 | Occasionally | 542 |
51.7%
|
| 2 | Frequentlt | 212 |
20.2%
|
| 9 | Don't know | 1 |
0.1%
|