| Value | Category | Cases | |
|---|---|---|---|
| -1 | missing | 0 |
0%
|
| 0 | never | 24616 |
46.1%
|
| 1 | once or twice | 2695 |
5%
|
| 2 | a few times | 2023 |
3.8%
|
| 3 | often | 1450 |
2.7%
|
| 7 | not applicable | 22614 |
42.3%
|
| 8 | refused | 11 |
0%
|
| 9 | don't know | 35 |
0.1%
|