| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1901 |
79.2%
|
| 1 | Just once or twice | 185 |
7.7%
|
| 2 | Several times | 197 |
8.2%
|
| 3 | Many times | 77 |
3.2%
|
| 4 | Always | 38 |
1.6%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 2 |
0.1%
|