| Value | Category | Cases | |
|---|---|---|---|
| 0 | 305 |
89.4%
|
|
| 18 | 1 |
0.3%
|
|
| 28 | 1 |
0.3%
|
|
| 99 | Missing | 34 |
10%
|
| Sysmiss | 850 |