| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 24319 |
53.1%
|
| 1 | Just once or twice | 6721 |
14.7%
|
| 2 | Several times | 8477 |
18.5%
|
| 3 | Many times | 5033 |
11%
|
| 4 | Always | 1203 |
2.6%
|
| 8 | Refused | 19 |
0%
|
| 9 | Don't know | 51 |
0.1%
|