| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1999 |
83.3%
|
| 1 | Only once | 179 |
7.5%
|
| 2 | A few times | 128 |
5.3%
|
| 3 | Often | 78 |
3.3%
|
| 8 | Refused to answer | 4 |
0.2%
|
| 9 | Don’t know | 12 |
0.5%
|