| Value | Category | Cases | |
|---|---|---|---|
| -1 | missing | 0 |
0%
|
| 0 | never | 4367 |
9.1%
|
| 1 | once or twice | 1113 |
2.3%
|
| 2 | a few times | 708 |
1.5%
|
| 3 | often | 657 |
1.4%
|
| 7 | not applicable | 41215 |
85.7%
|
| 8 | refused | 11 |
0%
|
| 9 | don't know | 13 |
0%
|