| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 1 |
0.1%
|
| 0 | Never | 932 |
77.9%
|
| 1 | Only once | 49 |
4.1%
|
| 2 | A few times | 124 |
10.4%
|
| 3 | Often | 82 |
6.9%
|
| 9 | Don't know | 9 |
0.8%
|
| 998 | Refused | 0 |
0%
|