| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1592 |
66.4%
|
| 1 | Only once | 331 |
13.8%
|
| 2 | A few times | 330 |
13.8%
|
| 3 | Often | 143 |
6%
|
| 9 | Don't know | 3 |
0.1%
|
| 998 | Refused | 0 |
0%
|