| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 923 |
76.9%
|
| 1 | Just once or twice | 154 |
12.8%
|
| 2 | Several times | 98 |
8.2%
|
| 3 | Many times | 17 |
1.4%
|
| 4 | Always | 5 |
0.4%
|
| 8 | Refused | 1 |
0.1%
|
| 9 | Don't know | 2 |
0.2%
|