| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 773 |
64.4%
|
| 1 | Once or twice | 187 |
15.6%
|
| 2 | A few times | 200 |
16.7%
|
| 3 | Often | 27 |
2.3%
|
| 8 | Refused | 8 |
0.7%
|
| 9 | Don't know | 5 |
0.4%
|