| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 772 |
64.3%
|
| 1 | Once or twice | 216 |
18%
|
| 2 | Several times | 150 |
12.5%
|
| 3 | Often | 43 |
3.6%
|
| 8 | Refused | 3 |
0.3%
|
| 9 | Don’t know | 16 |
1.3%
|