| Value | Category | Cases | |
|---|---|---|---|
| -1 | 803 |
9.7%
|
|
| 0 | 6401 |
77.2%
|
|
| 1 | 815 |
9.8%
|
|
| 2 | 255 |
3.1%
|
|
| 4 | 21 |
0.3%
|
|
| Sysmiss | 515 |