| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1991 |
83%
|
| 1 | Only once | 208 |
8.7%
|
| 2 | A few times | 154 |
6.4%
|
| 3 | Often | 43 |
1.8%
|
| 9 | Don't know | 3 |
0.1%
|
| 998 | Refused | 0 |
0%
|