| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 930 |
77.5%
|
| 1 | Only once | 117 |
9.8%
|
| 2 | A few times | 114 |
9.5%
|
| 3 | Often | 37 |
3.1%
|
| 9 | Don't know | 2 |
0.2%
|
| 998 | Refused | 0 |
0%
|