| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 8 |
0.7%
|
| 0 | Never | 801 |
72.6%
|
| 1 | Only once | 154 |
13.9%
|
| 2 | A few times | 100 |
9.1%
|
| 3 | Often | 39 |
3.5%
|
| 9 | Don't know | 2 |
0.2%
|
| 998 | Refused | 0 |
0%
|