| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 82 |
10.2%
|
| 1 | Most of the time | 198 |
24.7%
|
| 2 | Some time | 523 |
65.1%
|
| 9 | Missing | 7 | |
| Sysmiss | 156022 |