| Value | Category | Cases | |
|---|---|---|---|
| 0 | 65 |
45.1%
|
|
| 15 | 7 |
4.9%
|
|
| 17 | 4 |
2.8%
|
|
| 18 | 11 |
7.6%
|
|
| 19 | 23 |
16%
|
|
| 20 | 34 |
23.6%
|
|
| Sysmiss | 9 |