| Value | Category | Cases | |
|---|---|---|---|
| -1 | refuse | 7 |
18.4%
|
| 0 | 19 |
50%
|
|
| 3 | 4 |
10.5%
|
|
| 5 | 2 |
5.3%
|
|
| 8 | 1 |
2.6%
|
|
| 10 | 2 |
5.3%
|
|
| 20 | 3 |
7.9%
|
|
| Sysmiss | 1011 |