| Value | Category | Cases | |
|---|---|---|---|
| 5 | 1 |
5%
|
|
| 6 | 6 |
30%
|
|
| 7 | 10 |
50%
|
|
| 8 | 2 |
10%
|
|
| 15 | 1 |
5%
|
|
| Sysmiss | 2011 |