| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 79 |
7.5%
|
| 1 | Once or twice | 129 |
12.3%
|
| 2 | A few times | 125 |
11.9%
|
| 3 | Often | 457 |
43.6%
|
| 7 | No experience | 256 |
24.4%
|
| 9 | Don't know | 2 |
0.2%
|