| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11-15 | 122 |
28.1%
|
| 2 | 16-20 | 210 |
48.4%
|
| 3 | 21-25 | 68 |
15.7%
|
| 4 | 26-30 | 25 |
5.8%
|
| 5 | more than 30 | 9 |
2.1%
|
| Sysmiss | 337 |