| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 963 |
80.3%
|
| 1 | Only once | 133 |
11.1%
|
| 2 | A few times | 85 |
7.1%
|
| 3 | Often | 18 |
1.5%
|
| 9 | Don't know | 1 |
0.1%
|
| 998 | Refused | 0 |
0%
|