| Value | Category | Cases | |
|---|---|---|---|
| -99 | Could not observe | 2 |
0.1%
|
| -95 | 3 |
0.2%
|
|
| 1 | Yes | 1901 |
97.8%
|
| 2 | No | 37 |
1.9%
|
| Sysmiss | 5297 |