| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 992 |
82.7%
|
| 1 | Once or twice | 118 |
9.8%
|
| 2 | Several times | 59 |
4.9%
|
| 3 | Often | 26 |
2.2%
|
| 8 | Refused | 3 |
0.3%
|
| 9 | Don’t know | 2 |
0.2%
|