| Value | Category | Cases | |
|---|---|---|---|
| -99 | DK | 0 |
0%
|
| -88 | Missing | 2 |
0.3%
|
| -77 | NA | 91 |
14.8%
|
| 1 | Yes | 6 |
1%
|
| 2 | No | 517 |
83.9%
|
| Sysmiss | 6 |