| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 1 |
0%
|
| 0 | Never | 1922 |
80.1%
|
| 1 | Only once | 229 |
9.5%
|
| 2 | A few times | 194 |
8.1%
|
| 3 | Often | 53 |
2.2%
|
| 9 | Don't know | 1 |
0%
|
| 998 | Refused | 0 |
0%
|