| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 1 |
0%
|
| 0 | Never | 1915 |
78.8%
|
| 1 | Only once | 201 |
8.3%
|
| 2 | A few times | 212 |
8.7%
|
| 3 | Often | 81 |
3.3%
|
| 9 | Don't know | 21 |
0.9%
|
| 998 | Refused | 0 |
0%
|