| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1048 |
43.1%
|
| 1 | Only once | 426 |
17.5%
|
| 2 | A few times | 628 |
25.8%
|
| 3 | Often | 328 |
13.5%
|
| 9 | Don't know | 1 |
0%
|
| 998 | Refused | 0 |
0%
|