| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 14 |
0.1%
|
| 0 | Never | 19903 |
81.9%
|
| 1 | Only once | 1585 |
6.5%
|
| 2 | A few times | 1819 |
7.5%
|
| 3 | Often | 809 |
3.3%
|
| 9 | Don't know | 171 |
0.7%
|
| 98 | Refused | 0 |
0%
|