| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 1 |
0.1%
|
| 0 | Never | 860 |
71.7%
|
| 1 | Only once | 118 |
9.8%
|
| 2 | A few times | 152 |
12.7%
|
| 3 | Often | 63 |
5.3%
|
| 9 | Don't know | 6 |
0.5%
|