| Value | Category | Cases | |
|---|---|---|---|
| -1 | missing | 0 |
0%
|
| 0 | never | 14209 |
26.6%
|
| 1 | once or twice | 1569 |
2.9%
|
| 2 | a few times | 1138 |
2.1%
|
| 3 | often | 627 |
1.2%
|
| 7 | not applicable | 35868 |
67.1%
|
| 8 | refused | 8 |
0%
|
| 9 | don't know | 25 |
0%
|