| Value | Category | Cases | |
|---|---|---|---|
| -1 | missing | 0 |
0%
|
| 0 | never | 1222 |
90.5%
|
| 1 | sometimes | 92 |
6.8%
|
| 2 | often | 27 |
2%
|
| 3 | always | 2 |
0.1%
|
| 9 | don't know | 7 |
0.5%
|