| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 389 |
30.8%
|
| 1 | Most of the time | 341 |
27%
|
| 2 | Some time | 535 |
42.3%
|
| 9 | Missing | 33 | |
| Sysmiss | 155534 |