| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1425 |
59.6%
|
| 1 | Once or twice | 313 |
13.1%
|
| 2 | A few times | 364 |
15.2%
|
| 3 | Often | 197 |
8.2%
|
| 8 | Refused | 59 |
2.5%
|
| 9 | Don't know | 34 |
1.4%
|