| Value | Category | Cases | |
|---|---|---|---|
| 18 | 1 |
3.1%
|
|
| 19 | 2 |
6.3%
|
|
| 20 | 7 |
21.9%
|
|
| 21 | 9 |
28.1%
|
|
| 22 | 9 |
28.1%
|
|
| 23 | 4 |
12.5%
|
|
| Sysmiss | 41980 |