| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 928 |
77.3%
|
| 1 | Only once | 135 |
11.3%
|
| 2 | A few times | 99 |
8.3%
|
| 3 | Often | 30 |
2.5%
|
| 8 | Refused | 1 |
0.1%
|
| 9 | Don’t know | 7 |
0.6%
|