| Value | Category | Cases | |
|---|---|---|---|
| 17 | 1 |
1.4%
|
|
| 18 | 3 |
4.1%
|
|
| 19 | 7 |
9.5%
|
|
| 20 | 13 |
17.6%
|
|
| 21 | 16 |
21.6%
|
|
| 22 | 21 |
28.4%
|
|
| 23 | 13 |
17.6%
|
|
| Sysmiss | 41938 |