| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 35267 |
77%
|
| 1 | Only once | 3711 |
8.1%
|
| 2 | A few times | 4080 |
8.9%
|
| 3 | Often | 2364 |
5.2%
|
| 8 | Refused | 70 |
0.2%
|
| 9 | Don’t know | 331 |
0.7%
|