| Value | Category | Cases | |
|---|---|---|---|
| 0 | 252 |
25.9%
|
|
| 5 | 334 |
34.4%
|
|
| 10 | 252 |
25.9%
|
|
| 15 | 134 |
13.8%
|
|
| Sysmiss | 591 |