| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 391 |
16.3%
|
| 1 | Just once or twice | 194 |
8.1%
|
| 2 | Several times | 777 |
32.4%
|
| 3 | Many times | 978 |
40.8%
|
| 4 | Always | 59 |
2.5%
|
| 8 | Refused | 1 |
0%
|
| 9 | Don't know | 0 |
0%
|