| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 601 |
49.9%
|
| 1 | Just once or twice | 148 |
12.3%
|
| 2 | Several times | 244 |
20.3%
|
| 3 | Many times | 105 |
8.7%
|
| 4 | Always | 99 |
8.2%
|
| 8 | Refused | 3 |
0.2%
|
| 9 | Don't know | 4 |
0.3%
|