| Value | Category | Cases | |
|---|---|---|---|
| -1 | missing | 0 |
0%
|
| 0 | never | 4228 |
7.9%
|
| 1 | once or twice | 1050 |
2%
|
| 2 | a few times | 780 |
1.5%
|
| 3 | often | 751 |
1.4%
|
| 7 | not applicable | 46610 |
87.2%
|
| 8 | refused | 9 |
0%
|
| 9 | don't know | 16 |
0%
|