| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 7 |
0.3%
|
| 0 | Never | 1813 |
74.6%
|
| 1 | Only once | 210 |
8.6%
|
| 2 | A few times | 227 |
9.3%
|
| 3 | Often | 127 |
5.2%
|
| 9 | Don't know | 47 |
1.9%
|
| 998 | Refused | 0 |
0%
|