| Value | Category | Cases | |
|---|---|---|---|
| 18 | 1 |
0.4%
|
|
| 19 | 1 |
0.4%
|
|
| 20 | 19 |
7.6%
|
|
| 21 | 91 |
36.4%
|
|
| 22 | 81 |
32.4%
|
|
| 24 | 52 |
20.8%
|
|
| 25 | 4 |
1.6%
|
|
| 27 | 1 |
0.4%
|
|
| Sysmiss | 83 |