| Value | Category | Cases | |
|---|---|---|---|
| 15 | 1 |
2.1%
|
|
| 17 | 1 |
2.1%
|
|
| 18 | 3 |
6.4%
|
|
| 20 | 8 |
17%
|
|
| 21 | 1 |
2.1%
|
|
| 23 | 3 |
6.4%
|
|
| 25 | 19 |
40.4%
|
|
| 30 | 10 |
21.3%
|
|
| 31 | 1 |
2.1%
|
|
| Sysmiss | 7 |