| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0 | 7819 |
51.6%
|
| 15 | 15 | 2125 |
14%
|
| 30 | 30 | 4563 |
30.1%
|
| 45 | 45 | 646 |
4.3%
|
| Sysmiss | 26859 |