| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1116 |
88.6%
|
| 1 | Only once | 26 |
2.1%
|
| 2 | A few times | 66 |
5.2%
|
| 3 | Often | 21 |
1.7%
|
| 9 | Don't know | 31 |
2.5%
|
| 998 | Refused | 0 |
0%
|
| Sysmiss | 4 |