| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1025 |
85.4%
|
| 1 | Once or twice | 83 |
6.9%
|
| 2 | Several times | 64 |
5.3%
|
| 3 | Many times | 20 |
1.7%
|
| 8 | Refused | 2 |
0.2%
|
| 9 | Don't know | 6 |
0.5%
|