| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1012 |
84.3%
|
| 1 | Only once | 91 |
7.6%
|
| 2 | A few times | 61 |
5.1%
|
| 3 | Often | 30 |
2.5%
|
| 8 | Refused | 2 |
0.2%
|
| 9 | Don’t know | 4 |
0.3%
|