| Value | Category | Cases | |
|---|---|---|---|
| -999 | -999 | 1 |
1.1%
|
| -888 | -888 | 1 |
1.1%
|
| -777 | Not Applicable | 3 |
3.3%
|
| 0 | No | 16 |
17.8%
|
| 1 | Yes | 69 |
76.7%
|
| Sysmiss | 822 |