| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0 | 272 |
89.2%
|
| 1 | 1 | 1 |
0.3%
|
| 2 | 2 | 18 |
5.9%
|
| 99 | Unspecified | 14 |
4.6%
|
| Sysmiss | 1353 |