| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1997 |
83.2%
|
| 1 | Only once | 174 |
7.3%
|
| 2 | A few times | 141 |
5.9%
|
| 3 | Often | 69 |
2.9%
|
| 9 | Don't know | 19 |
0.8%
|
| 98 | Refused | 0 |
0%
|