| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 968 |
80.7%
|
| 1 | Only once | 113 |
9.4%
|
| 2 | A few times | 81 |
6.8%
|
| 3 | Often | 38 |
3.2%
|
| 9 | Don't know | 0 |
0%
|
| 998 | Refused | 0 |
0%
|