| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1864 |
77.7%
|
| 1 | Only once | 243 |
10.1%
|
| 2 | A few times | 212 |
8.8%
|
| 3 | Often | 77 |
3.2%
|
| 9 | Don't know | 4 |
0.2%
|
| 998 | Refused | 0 |
0%
|