| Value | Category | Cases | |
|---|---|---|---|
| 0 | 3 |
1.6%
|
|
| 2 | 136 |
74.7%
|
|
| 6 | 12 |
6.6%
|
|
| 7 | 21 |
11.5%
|
|
| 9 | 10 |
5.5%
|
|
| Sysmiss | 1029 |