| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 1 |
0.1%
|
| 0 | Never | 400 |
33.3%
|
| 1 | Just once or twice | 239 |
19.9%
|
| 2 | Several times | 382 |
31.8%
|
| 3 | Many times | 167 |
13.9%
|
| 4 | Always | 9 |
0.8%
|
| 9 | Don't Know | 2 |
0.2%
|