| Value | Category | Cases | |
|---|---|---|---|
| 0 | 39 |
27.1%
|
|
| 15 | 11 |
7.6%
|
|
| 16 | 1 |
0.7%
|
|
| 17 | 2 |
1.4%
|
|
| 19 | 34 |
23.6%
|
|
| 20 | 57 |
39.6%
|
|
| Sysmiss | 9 |