| Value | Category | Cases | |
|---|---|---|---|
| 0 | 255 |
64.4%
|
|
| 15 | 8 |
2%
|
|
| 20 | 1 |
0.3%
|
|
| 30 | 93 |
23.5%
|
|
| 45 | 34 |
8.6%
|
|
| 50 | 3 |
0.8%
|
|
| 55 | 2 |
0.5%
|
|
| Sysmiss | 4 |