| Value | Category | Cases | |
|---|---|---|---|
| -99 | DK | 0 |
0%
|
| -88 | Missing | 0 |
0%
|
| -77 | NA | 0 |
0%
|
| 1 | Yes | 18 |
3.7%
|
| 2 | No | 463 |
96.3%
|
| Sysmiss | 1296 |