| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1837 |
76.2%
|
| 1 | Only once | 285 |
11.8%
|
| 2 | A few times | 221 |
9.2%
|
| 3 | Often | 56 |
2.3%
|
| 9 | Don't know | 11 |
0.5%
|
| 998 | Refused | 0 |
0%
|