| Value | Category | Cases | |
|---|---|---|---|
| 0 | 97 |
67.4%
|
|
| 15 | 1 |
0.7%
|
|
| 18 | 4 |
2.8%
|
|
| 19 | 12 |
8.3%
|
|
| 20 | 30 |
20.8%
|
|
| Sysmiss | 9 |