| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 1 |
0.1%
|
| 0 | Never | 1126 |
94%
|
| 1 | Only once | 22 |
1.8%
|
| 2 | A few times | 41 |
3.4%
|
| 3 | Often | 7 |
0.6%
|
| 9 | Don't know | 1 |
0.1%
|
| 998 | Refused | 0 |
0%
|