| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 2017 |
84%
|
| 1 | Only once | 162 |
6.8%
|
| 2 | A few times | 179 |
7.5%
|
| 3 | Often | 40 |
1.7%
|
| 9 | Don't know | 2 |
0.1%
|
| 98 | Refused | 0 |
0%
|