| Value | Category | Cases | |
|---|---|---|---|
| 8 | 2 |
10%
|
|
| 12 | 5 |
25%
|
|
| 15 | 9 |
45%
|
|
| 18 | 3 |
15%
|
|
| 20 | 1 |
5%
|
|
| Sysmiss | 1953 |