| Value | Category | Cases | |
|---|---|---|---|
| 1 | 13 | 3 |
2.3%
|
| 2 | 14 | 24 |
18.5%
|
| 3 | 15 | 31 |
23.8%
|
| 4 | 16 | 31 |
23.8%
|
| 5 | 17 | 22 |
16.9%
|
| 6 | 18 | 8 |
6.2%
|
| 7 | 19 | 2 |
1.5%
|
| 8 | 20 | 2 |
1.5%
|
| 9 | 21 | 1 |
0.8%
|
| 10 | Age of the student | 0 |
0%
|
| 11 | NONE | 2 |
1.5%
|
| Sysmiss | 4 |