| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 1 |
0%
|
| 0 | Never | 1930 |
80.4%
|
| 1 | Only once | 248 |
10.3%
|
| 2 | A few times | 169 |
7%
|
| 3 | Often | 48 |
2%
|
| 9 | Don't know | 4 |
0.2%
|