| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1526 |
63.6%
|
| 1 | Only once | 337 |
14%
|
| 2 | A few times | 372 |
15.5%
|
| 3 | Often | 165 |
6.9%
|
| 9 | Don't know | 0 |
0%
|
| 998 | Refused | 0 |
0%
|