| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1883 |
81%
|
| 1 | Only once | 172 |
7.4%
|
| 2 | A few times | 179 |
7.7%
|
| 3 | Often | 61 |
2.6%
|
| 9 | Don't know | 29 |
1.2%
|
| 998 | Refused | 0 |
0%
|