| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0 | 13279 |
55.4%
|
| 15 | 15 | 3461 |
14.4%
|
| 30 | 30 | 6227 |
26%
|
| 45 | 45 | 1002 |
4.2%
|
| Sysmiss | 18043 |