| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1337 |
55.7%
|
| 1 | Once or twice | 246 |
10.3%
|
| 2 | A few times | 327 |
13.6%
|
| 3 | Often | 472 |
19.7%
|
| 8 | Refused | 1 |
0%
|
| 9 | Don't know | 17 |
0.7%
|