| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1620 |
67.5%
|
| 1 | Only once | 332 |
13.8%
|
| 2 | A few times | 336 |
14%
|
| 3 | Often | 111 |
4.6%
|
| 9 | Don't know | 1 |
0%
|
| 98 | Refused | 0 |
0%
|