| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 969 |
80.8%
|
| 1 | Only once | 60 |
5%
|
| 2 | A few times | 117 |
9.8%
|
| 3 | Often | 36 |
3%
|
| 8 | Refused | 2 |
0.2%
|
| 9 | Don’t know | 16 |
1.3%
|