| Value | Category | Cases | |
|---|---|---|---|
| -999 | -999 | 26 |
0.6%
|
| -888 | -888 | 148 |
3.2%
|
| 1 | Most of the time | 148 |
3.2%
|
| 2 | Some of the time | 642 |
14%
|
| 3 | Not very often | 873 |
19%
|
| 4 | Never | 2754 |
60%
|
| Sysmiss | 359 |