| Value | Category | Cases | |
|---|---|---|---|
| 20 | 1 |
3.4%
|
|
| 30 | 1 |
3.4%
|
|
| 50 | 10 |
34.5%
|
|
| 60 | 8 |
27.6%
|
|
| 70 | 8 |
27.6%
|
|
| 80 | 1 |
3.4%
|
|
| Sysmiss | 820 |