| Value | Category | Cases | |
|---|---|---|---|
| 0 | 256 |
64.6%
|
|
| 1 | 1 |
0.3%
|
|
| 15 | 7 |
1.8%
|
|
| 20 | 1 |
0.3%
|
|
| 30 | 92 |
23.2%
|
|
| 45 | 35 |
8.8%
|
|
| 50 | 2 |
0.5%
|
|
| 55 | 2 |
0.5%
|
|
| Sysmiss | 4 |