| Value | Category | Cases | |
|---|---|---|---|
| 0 | 17 |
11.8%
|
|
| 15 | 12 |
8.3%
|
|
| 17 | 4 |
2.8%
|
|
| 18 | 30 |
20.8%
|
|
| 19 | 74 |
51.4%
|
|
| 20 | 7 |
4.9%
|
|
| Sysmiss | 9 |