| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1489 |
62%
|
| 1 | Once or twice | 384 |
16%
|
| 2 | Several times | 354 |
14.8%
|
| 3 | Often | 153 |
6.4%
|
| 8 | Refused | 5 |
0.2%
|
| 9 | Don’t know | 15 |
0.6%
|