| Value | Category | Cases | |
|---|---|---|---|
| -1 | missing | 0 |
0%
|
| 0 | never | 7852 |
14.7%
|
| 1 | once or twice | 5591 |
10.5%
|
| 2 | a few times | 7844 |
14.7%
|
| 3 | often | 9477 |
17.7%
|
| 7 | not applicable | 22614 |
42.3%
|
| 8 | refused | 5 |
0%
|
| 9 | don't know | 61 |
0.1%
|