| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 847 |
70.6%
|
| 1 | Once or twice | 160 |
13.3%
|
| 2 | Several times | 117 |
9.8%
|
| 3 | Many times | 42 |
3.5%
|
| 8 | Refused | 1 |
0.1%
|
| 9 | Don't know | 33 |
2.8%
|