| Value | Category | Cases | |
|---|---|---|---|
| -99 | DK | 0 |
0%
|
| -88 | Missing | 0 |
0%
|
| -77 | NA | 94 |
10.7%
|
| 1 | Yes | 646 |
73.2%
|
| 2 | No | 142 |
16.1%
|
| Sysmiss | 2 |