| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 1997 |
82.2%
|
| 1 | Only once | 188 |
7.7%
|
| 2 | A few times | 173 |
7.1%
|
| 3 | Often | 57 |
2.3%
|
| 9 | Don't know | 13 |
0.5%
|