| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 13 |
1.1%
|
| 0 | Never | 868 |
72.3%
|
| 1 | Once | 170 |
14.2%
|
| 2 | Twice | 69 |
5.8%
|
| 3 | Three or more times | 18 |
1.5%
|
| 9 | Don't know / Can't remember | 62 |
5.2%
|
| 98 | Refused | 0 |
0%
|