| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 767 |
64%
|
| 1 | Only once | 97 |
8.1%
|
| 2 | A few times | 191 |
15.9%
|
| 3 | Often | 144 |
12%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don’t know | 0 |
0%
|