| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1134 |
84%
|
| 1 | Only once | 50 |
3.7%
|
| 2 | A few times | 102 |
7.6%
|
| 3 | Often | 62 |
4.6%
|
| 9 | Don't know | 2 |
0.1%
|
| 998 | Refused | 0 |
0%
|