| Value | Category | Cases | |
|---|---|---|---|
| 1 | 15-20 | 32 |
26.2%
|
| 2 | 21-25 | 8 |
6.6%
|
| 3 | 26-30 | 21 |
17.2%
|
| 4 | 31-35 | 24 |
19.7%
|
| 5 | 36-40 | 18 |
14.8%
|
| 6 | 41-45 | 11 |
9%
|
| 7 | 46-50 | 8 |
6.6%
|
| Sysmiss | 10 |