| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 715 |
59.6%
|
| 1 | Just once or twice | 114 |
9.5%
|
| 2 | Several times | 215 |
17.9%
|
| 3 | Many times | 128 |
10.7%
|
| 4 | Always | 27 |
2.3%
|
| 8 | Refused | 1 |
0.1%
|
| 9 | Don't know | 0 |
0%
|