| Value | Category | Cases | |
|---|---|---|---|
| 6 | 1594 |
12.2%
|
|
| 7 | 4739 |
36.4%
|
|
| 8 | 3870 |
29.7%
|
|
| 9 | 2826 |
21.7%
|
|
| Sysmiss | 3743 |