| Value | Category | Cases | |
|---|---|---|---|
| -1 | missing | 0 |
0%
|
| 0 | never | 1215 |
90%
|
| 1 | sometimes | 85 |
6.3%
|
| 2 | often | 25 |
1.9%
|
| 3 | always | 2 |
0.1%
|
| 9 | don't know | 23 |
1.7%
|