| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not at all | 3093 |
30.3%
|
| 2 | Once | 3691 |
36.1%
|
| 3 | Twice | 1539 |
15.1%
|
| 4 | Three times | 672 |
6.6%
|
| 5 | More than three times | 1229 |
12%
|
| -5 | Missing; RU: Inappropriate response | 5 | |
| -4 | Not asked in survey | 11448 | |
| -3 | Not applicable ('Not have done') | 66137 | |
| -2 | No answer | 1689 | |
| -1 | Don't know | 62 |