| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 14 |
0.1%
|
| 0 | Never | 23814 |
85.9%
|
| 1 | Only once | 1423 |
5.1%
|
| 2 | A few times | 1548 |
5.6%
|
| 3 | Often | 650 |
2.3%
|
| 9 | Don't know | 264 |
1%
|
| 998 | Refused | 0 |
0%
|