| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 2183 |
91%
|
| 1 | Once | 149 |
6.2%
|
| 2 | Twice | 23 |
1%
|
| 3 | Three or more times | 22 |
0.9%
|
| 9 | Don't know / Can't remember | 23 |
1%
|
| 98 | Refused | 0 |
0%
|