| Value | Category | Cases | |
|---|---|---|---|
| 18 | 1 |
0.4%
|
|
| 20 | 7 |
2.9%
|
|
| 21 | 54 |
22.4%
|
|
| 22 | 76 |
31.5%
|
|
| 24 | 96 |
39.8%
|
|
| 25 | 7 |
2.9%
|
|
| Sysmiss | 92 |