| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 1425 |
18.2%
|
| 1 | Sometimes | 3015 |
38.5%
|
| 2 | Always | 3398 |
43.4%
|
| 88 | 307 | ||
| 99 | 213 | ||
| Sysmiss | 770 |