| Value | Category | Cases | |
|---|---|---|---|
| -99 | DK | 0 |
0%
|
| -88 | Missing | 0 |
0%
|
| -77 | NA | 98 |
11.1%
|
| 1 | Yes | 162 |
18.3%
|
| 2 | No | 623 |
70.6%
|
| Sysmiss | 1 |