| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 2 |
0.1%
|
| 0 | Never | 1943 |
81%
|
| 1 | Only once | 221 |
9.2%
|
| 2 | A few times | 173 |
7.2%
|
| 3 | Often | 58 |
2.4%
|
| 9 | Don't know | 1 |
0%
|
| 98 | Refused | 0 |
0%
|