| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 15 |
0.1%
|
| 0 | Never | 11457 |
47.1%
|
| 1 | Just once or twice | 3621 |
14.9%
|
| 2 | Several times | 5020 |
20.7%
|
| 3 | Many times | 3487 |
14.3%
|
| 4 | Always | 658 |
2.7%
|
| 9 | Don't Know | 43 |
0.2%
|
| 98 | Refused | 0 |
0%
|