| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 976 |
81.3%
|
| 1 | Only once | 102 |
8.5%
|
| 2 | A few times | 90 |
7.5%
|
| 3 | Often | 28 |
2.3%
|
| 8 | Refused | 1 |
0.1%
|
| 9 | Don’t know | 3 |
0.3%
|