| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 737 |
61.5%
|
| 1 | Once or twice | 156 |
13%
|
| 2 | A few times | 170 |
14.2%
|
| 3 | Often | 136 |
11.3%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 0 |
0%
|