| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 65 |
12.7%
|
| 1 | Most of the time | 128 |
25%
|
| 2 | Some time | 319 |
62.3%
|
| 9 | Missing | 11 | |
| Sysmiss | 156309 |