| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 932 |
77.7%
|
| 1 | Only once | 98 |
8.2%
|
| 2 | A few times | 122 |
10.2%
|
| 3 | Often | 45 |
3.8%
|
| 9 | Don't know | 3 |
0.3%
|
| 998 | Refused | 0 |
0%
|