| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0 | 11284 |
35.7%
|
| 15 | 15 | 9940 |
31.4%
|
| 30 | 30 | 9384 |
29.7%
|
| 45 | 45 | 1038 |
3.3%
|
| Sysmiss | 10366 |