| Value | Category | Cases | |
|---|---|---|---|
| -1 | missing | 0 |
0%
|
| 0 | never | 13675 |
25.6%
|
| 1 | once or twice | 5636 |
10.5%
|
| 2 | a few times | 6442 |
12.1%
|
| 3 | often | 4967 |
9.3%
|
| 7 | not applicable | 22614 |
42.3%
|
| 8 | refused | 11 |
0%
|
| 9 | don't know | 99 |
0.2%
|