| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 999 |
83.3%
|
| 1 | Once | 115 |
9.6%
|
| 2 | Twice | 32 |
2.7%
|
| 3 | Three or more times | 54 |
4.5%
|
| 9 | Don't know / Can't remember | 0 |
0%
|
| 98 | Refused | 0 |
0%
|