| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0 | 490 |
34.9%
|
| 15 | 15 | 457 |
32.5%
|
| 30 | 30 | 395 |
28.1%
|
| 45 | 45 | 64 |
4.6%
|
| Sysmiss | 40606 |