| Value | Category | Cases | |
|---|---|---|---|
| 0 | 1 |
4.5%
|
|
| 1 | 1 |
4.5%
|
|
| 10 | 6 |
27.3%
|
|
| 15 | 1 |
4.5%
|
|
| 20 | 7 |
31.8%
|
|
| 30 | 3 |
13.6%
|
|
| 40 | 3 |
13.6%
|
|
| Sysmiss | 378 |