| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1078 |
90.1%
|
| 1 | Only once | 41 |
3.4%
|
| 2 | A few times | 49 |
4.1%
|
| 3 | Often | 21 |
1.8%
|
| 9 | Don't know | 8 |
0.7%
|
| 998 | Refused | 0 |
0%
|