| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0 | 15743 |
57.8%
|
| 15 | 15 | 3897 |
14.3%
|
| 30 | 30 | 6609 |
24.2%
|
| 45 | 45 | 1007 |
3.7%
|
| Sysmiss | 14756 |