| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1625 |
68.3%
|
| 1 | Once or twice | 415 |
17.5%
|
| 2 | Several times | 137 |
5.8%
|
| 3 | Many times | 190 |
8%
|
| 8 | Refused | 1 |
0%
|
| 9 | Don't know | 10 |
0.4%
|