| Value | Category | Cases | |
|---|---|---|---|
| 0 | 34 |
70.8%
|
|
| 6 | 1 |
2.1%
|
|
| 10 | 2 |
4.2%
|
|
| 13 | 1 |
2.1%
|
|
| 15 | 2 |
4.2%
|
|
| 20 | 1 |
2.1%
|
|
| 30 | 7 |
14.6%
|
|
| Sysmiss | 1250 |