| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0 | 18695 |
62.5%
|
| 15 | 15 | 4009 |
13.4%
|
| 30 | 30 | 6281 |
21%
|
| 45 | 45 | 919 |
3.1%
|
| Sysmiss | 12108 |