| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 2343 |
97.6%
|
| 1 | Once or twice | 27 |
1.1%
|
| 2 | Several times | 17 |
0.7%
|
| 3 | Many times | 12 |
0.5%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 1 |
0%
|