| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 1 |
0.1%
|
| 0 | Never | 850 |
70.8%
|
| 1 | Only once | 86 |
7.2%
|
| 2 | A few times | 161 |
13.4%
|
| 3 | Often | 100 |
8.3%
|
| 9 | Don't know | 2 |
0.2%
|