| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 1 |
0.1%
|
| 0 | Never | 1070 |
89.2%
|
| 1 | Only once | 34 |
2.8%
|
| 2 | A few times | 57 |
4.8%
|
| 3 | Often | 36 |
3%
|
| 9 | Don't know | 2 |
0.2%
|
| 998 | Refused | 0 |
0%
|