| Value | Category | Cases | |
|---|---|---|---|
| -1 | missing | 0 |
0%
|
| 0 | never | 29621 |
61.6%
|
| 1 | once or twice | 6357 |
13.2%
|
| 2 | a few times | 6026 |
12.5%
|
| 3 | often | 5757 |
12%
|
| 8 | refused | 35 |
0.1%
|
| 9 | don't know | 288 |
0.6%
|