| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 893 |
74.4%
|
| 1 | Only once | 101 |
8.4%
|
| 2 | A few times | 137 |
11.4%
|
| 3 | Often | 68 |
5.7%
|
| 9 | Don't know | 1 |
0.1%
|
| 998 | Refused | 0 |
0%
|